While attempting to save the members of SG-10 from a black hole on planet P3X 451, the SG-1 team activates the Stargate and exposes themselves to the hole's gravitational pull. Trying to break free, the team shuts down the gate's power and in the ensuing explosions Teal'c and Daniel are badly injured. Even without power the black hole's gravity continues to draw the SGC closer to the swirling wormhole. With the intense gravity field warping the space/time continuum, the SGC loses contact with the outside world and the Pentagon sends O'Neill's former mate Colonel Cromwell to investigate. Cromwell is tormented with guilt for deserting O'Neill during a Soviet mission and volunteers to partner him in the attempt to save the SGC. Time slows to a near stand-still inside the SGC, where only O'Neill and Cromwell are left. Carter scrambles for a solution before the SGC and then the Earth are torn apart by the black hole's gravitational tides.

Source: MGM Stargate SG-1

Trapped on Hathor's planet, Carter and Daniel can only watch helplessly as Hathor implants O'Neill with a Goa'uld symbiote. General Hammond sends Colonel Makepeace and six Stargate units to reclaim SG-1, but when the units are defeated, Hammond decides to do the job himself. Meanwhile, Makepeace succeeds in rescuing Carter and Daniel, but Hathor's army has created an Energy Barrier blocking them from the Stargate. Back in Hathor's facility, a Tok'ra spy closes O'Neill in a cryogenic chamber to kill his goa'uld host. As Carter rescues her freezing teammate, they come face to face with the enraged queen.

In the Jaffa city of Chulak, Teal'c attempts to raise an army to help his friends and stumbles across the injured Bra'tac, who has been left for dead by Apohpis' guards. Bra'tac leads them to an ancient Goa'uld ship and the three forge a daring rescue plan.

Source: MGM Stargate SG-1

En route to the infirmary after an extended mission, SG-1 learns that part of the SGC has been sealed off due to a chemical leak. Soon after, during their routine examinations, Dr. Fraiser injects each member of the team with a sedative, rendering them unconscious.

Teal'c is the first to awaken, and secretly observes Dr. Fraiser and General Hammond talking with two aliens. The General orders Teal'c and Carter placed in holding cells. Feigning unconsciousness, he waits until he and his escorts are away from the infirmary before overpowering the guards and waking Major Carter.

Carter and Teal'c quickly realize that they cannot trust anyone in the SGC and must seek help outside the base. During the escape, one of them is captured. The other must rely on the one person they can't trust in order to save the SGC and the Earth from invasion.

Source: MGM Stargate SG-1

While preparing for a week of leave, O'Neill is engulfed in a white glow and disappears. Carter immediately recognizes that O'Neill has been transported away by the Asgard.

O'Neill suddenly finds himself a little disoriented on Thor's ship. He begins to hear a strange sound and moments later is faced with hundreds of menacing looking metallic bugs. He freezes as they swarm past him. O'Neill heads in the direction the bugs came from and comes upon a very weak Thor. Thor tells O'Neill that he is dying and directs him to a control panel for further information as he is too weak. O'Neill learns that these bugs called replicators are artificial organisms that have overtaken the ship and have directed it to Earth. The effects of the replicators reaching Earth would be devastating.

O'Neill appears back in the briefing room of the SGC in the form of a hologram and informs General Hammond and the rest of his team of the situation. He orders them to gather a large amount of explosives that he will transport up. The team, of course, wants to be transported up as well, but O'Neill orders them not to.

O'Neill can't believe his eyes when the explosives arrive with SG-1 in tow. They have little time to formulate a plan to outwit the replicators and destroy the ship before it reaches Earth, hopefully finding a way to save themselves in the process.

Source: MGM Stargate SG-1

SG-1 returns the SGC with news that earth has been saved from the Replicators only to learn that one of the deadly creatures was not destroyed. After crashing into the ocean aboard Thor's ship, the Replicator bug has found its way into a Russian submarine where it has killed the entire crew and is continuing to rapidly replicate. O'Neill suggests that the sub be towed out to sea and nuked, but the Pentagon feels that such an act could cause a serious situation with the Russian government. Instead, O'Neill and Teal'c lead a small heavily armed team aboard the sub in the hopes that the Replicators can be eliminated by sheer firepower. Carter is taken to Thor's home planet which is on the verge of total destruction by the Replicators. Thor believes that perhaps Carter's human knowledge could hold the key to the Asgard defeating the Replicators once and for all.

Source: MGM Stargate SG-1

A test of the X-301, an experimental aircraft adapted from two Goa'uld death gliders, goes awry sending O'Neill and Teal'c hurtling out of Earth's orbit. As the X-301 streaks through space at a million miles an hour, the SGC struggles to find a way to retrieve it. But after an attempt to alter the aircraft's course fails, things look grim. Daniel Jackson seeks the help of off-world allies. He learns that the Tok'ra have a ship capable of reaching O'Neill and Teal'c, but it is on a covert mission in Goa'uld-controlled territory. With time ticking down and the lives of their comrades hanging in the balance, Carter and Daniel must locate the Tok'ra ship, intercept the X-301, and pull off a daring rescue.

Source: MGM Stargate SG-1

SG-1 is called to Abydos to investigate a strange phenomenon: a whirling sandstorm that seems to whisper Daniel's name. When they confront the twisting tempest, it dissolves to reveal a young boy who introduces himself as Shifu, the Harsesis.

Shifu is brought back to Stargate Command where he undergoes a series of tests. They reveal Shifu is physically normal. But it is apparent to all that the young boy is wise beyond his years. Possessing the genetic memory of the Goa'uld, he will undoubtedly prove a powerful weapon against the System Lords.

Faced with this prospect, the Harsesis child sets out to teach Daniel a lesson - by imbuing him with the sought-after genetic memories and launching him on a spiritual journey. Ultimately, Daniel must face a difficult challenge. Will he use his newfound knowledge to change the world for the better, or will he allow this knowledge to change him for the worse?

Source: MGM Stargate SG-1

After a near deadly pursuit by gliders and the well-aimed destruction of one vessel, the SG-1 team just manage to leap to safety through the Stargate. However, the craft demolished the system just as Teal'c jumps through and becomes lost in the ether. Teal'c's energy signature may have been lost. The S.G.C. faces a terrible dilemma: How to get Teal'c out of the gate system before the government forces a restart of the Stargate program, wiping out his energy pattern forever.

Source: MGM Stargate SG-1

Teal'c is returning from a mission when the wormhole destabilizes and he fails to materialize. The Stargate is immediately shut down, because a new wormhole connection might make it impossible to retrieve him. Dr. Daniel Jackson and Major Paul Davis, SGC's Pentagon liaison, go to Russia and ask them for the use of their DHD. Meanwhile, Major Samantha Carter approaches the problem from a physics standpoint, and winds up working with a man assigned by NID's Colonel Simmons. Colonel Jack O'Neill pursues his own leads and speaks with Harry Maybourne, who tells him that NID now has Adrian Conrad's Goa'uld symbiote. Each of the three SG-1 members force themselves to put up with people they dislike in order to rescue their stranded friend.

Source: SCIFI.COM Stargate SG-1

As an asteroid hurtles toward Earth, SG-1 repair an abandoned Goa'uld ship to use as a launch pad for a naquadah bomb which should explode the rock before impact. But the SGC loses the ship's signal and fears that SG-1 have crashed, leaving them dead and the Earth in devastating peril.

Source: MGM Stargate SG-1

A giant asteroid is detected, and its current trajectory puts it on a collision course with Earth. Based on the asteroid's mass, such an impact would destroy all life on the planet. SG-1 is tapped to help prevent this catastrophe. The only option they find is to retrieve a Goa'uld cargo vessel and use it to deliver a Naquadah bomb onto the asteroid, so they can blow the rock apart before it hits. Unfortunately, the plan starts falling apart, and the team discovers that the asteroid is not a natural one — it was planted by the Goa'uld for their own purposes.

Source: SCIFI.COM Stargate SG-1

SG-1 boards an apparently abandoned Goa'uld mothership and are ambushed. With its drive controls disabled by Anubis' evil plot, the ship plummets through the atmosphere and crashes into the Pacific Ocean. Trapped in the massive vessel as it sinks to the ocean floor, the team must find a way to escape - made all the more vital when the ship's self-destruct sequence activates.

Source: MGM Stargate SG-1

Source: SCIFI.COM Stargate SG-1

When TV reporter Julia Donovan gets wind of a top secret project called Prometheus, the president orders General Hammond to kill the story. An incensed Donovan threatens to alert the foreign media, forcing Hammond to offer her a tour of the project in return for an exclusive at a later date. Prometheus turns out to be a spaceship combining human know-how with alien technology. While Jonas and Carter give Donovan and her producer a tour of the bridge, the TV crew - Smith, Reynolds, Jones and Sanderson - overpowers the guards and activate the ship's lockdown controls.

Source: MGM Stargate SG-1

Major Carter tells Colonel O'Neill that a news reporter has solid information on Stargate Command's most classified project, Codename: Prometheus, along with a sample of the alien metal alloy, trinium. The journalist, Julia Donovan, plans to report that the Air Force is building some sort of secret nuclear reactor. She is wrong, however: Prometheus is not a reactor but the X-303 — the Air Force's third attempt to build an interstellar starship.

General Hammond thinks Donovan's conjecture is still too close for comfort and that SGC needs to identify the source leaking classified info. He confers with the President and authorizes Carter to make an exclusive deal, allowing Donovan and her producer, Al Martell, to tour the Prometheus site in return for her source and all her info and tapes. When the Air Forces goes public with the information, she would get the exclusive. Actually, SGC intends to doublecross the news team and destroy the tapes.

Carter and Jonas Quinn give Donovan and company a top-secret tour, but are ambushed by Donovan's camera crew — who have alien zats. Martell is in on it, too. Only Donovan is clueless.

The camera crew turns out to be a flight crew, and Jonas and Carter become prisoners. Jonas manages to buy some time by recalibrating the X-303's ignition settings and stopping the ship from taking off. Carter is imprisoned in a storage room, where she tries to rig some wiring into a transmitter.

Meanwhile, the hijackers radio O'Neill that if SGC does not release Adrian Conrad — the corrupt corporate magnate who is host to a Goa'uld — and Colonel Frank Simmons — the rogue NID agent who once aided Conrad for his own gain — within three hours, they'll blow up the X-303, turning the entire state into a smoking crater.

The hijackers force Jonas to undo his damage so that they can take off. They also shoot Martell. Fortunately, Carter gets her radio working. O'Neill orders her to sabotage the ship by cutting her way out of the storage room with a plasma torch and climbing to another deck, where she can sabotage the sublight control relay and ground the hijackers.

But with time running out and Carter still attempting to sabotage the ship, SGC turns Conrad and Simmons over to the hijackers. With Conrad's Goa'uld 's knowledge of the hyperdrive, they are ready to take off. SGC has no choice but to let them go. Luckily, Carter is able to escape the non-pressurized area in which she was trapped and get to a safe area, where she cuts the circuits to the sublight engines.

Meanwhile, Teal'c and O'Neill speed to the rescue in the death glider SG-1 once stole from Anubis. Teal'c and O'Neill board the X-303 just in time to save Carter from some of Simmons' goons. But with the hyperdrive now operational, the X-303 leaves Earth and heads toward coordinates Conrad gave to Simmons.

Conrad has his own plans, however, and takes out the rest of the crew. He then goes after Simmons — who shoots him dead, but not before Conrad's Goa'uld crawls into Simmons' skull. Teal'c and O'Neill battle Simmons and, when the X-303 comes out of hyperspace, O'Neill blows Simmons out the airlock.

One of the surviving traitors reveals that Simmons was after a cache of advanced technology the Ancients had hidden on a distant planet, and that he needed the help of Conrad's Goa'uld both to get the X-303's hyperdrive running, and to decipher the symbols on a tablet that specified the planet's coordinates.

The X-303 is now lost in space. But an Asgard ship suddenly appears and Supreme Asgard Commander Thor materializes on the bridge. It appears as though SG-1 is saved.

But it is Thor who needs aid. The Asgard homeworld has been overrun by the Replicators — and the fate of the universe hangs in the balance.

Source: SCIFI.COM Stargate SG-1

A professional hitman looking exactly like Colonel Jack O’Neill assassinates Senator Kinsey outside a Washington D.C. hotel. O'Neill is arrested and Hammond dispatches the rest of SG-1 to find the real killer. When Teal’c suggests that the assassin may have used duplicating technology to assume O'Neill's identity, Hammond tells Jonas about a recent security breach in which aliens used mimic devices to impersonate base personnel (Foothold) . It’s soon determined that 12 mimic devices captured from the aliens at the time have since been stolen. NID agent Malcolm Barrett informs Carter that Kinsey was working to expose a group of rogue agents within his organization.

Source: MGM Stargate SG-1

When Senator Kinsey is assassinated in broad daylight in front of a dozen civilian witnesses, Colonel Jack O'Neill is the prime suspect, having been seen and videotaped leaving the scene with a rifle in hand. And O'Neill's distaste for Kinsey, who had tried more than once to take down Stargate Command in order to control it, is well-known.

O'Neill's alibi, that he was alone on vacation fishing, is compromised when the murder weapon is found dumped in the lake near O'Neill's vacation cabin. With such damning evidence, General Hammond has no choice but to place O'Neill under arrest and then turn him over to the civilian authorities in Washington.

With the president, for political reasons, unable to intervene, General Hammond suspends SG-1's offworld duties and assigns Major Samantha Carter, Teal'c and Jonas Quinn to investigate the mystery and clear O'Neill.

Major Carter surmises there was only one way someone could have impersonated the colonel so precisely: Three years ago, aliens tried to take over SGC using mimic devices that could camouflage them to look like SGC personnel. After the situation was defused, SGC recovered 12 of the mimic devices, each programmed to impersonate a specific person. One of them had been made to mimic Colonel O'Neill.

They discover that the mimic devices under guard at Area 51 have been replaced with dummies. Carter has Teal'c and Jonas go through the personnel files of everyone who had access to the devices, while she goes to Washington to see Malcolm Barrett, a friend in the government's covert National Intelligence Division (NID).

Barrett tells Carter about an even more shadowy organization operating deep within the NID, and reveals he had blackmailed Senator Kinsey into working with him to expose this splinter group. But that group got to the senator first. Barrett then takes Carter to an illegal arms dealer who had sold the murder weapon to Colonel O'Neill's double. There they find another gun the shooter had handled, and Barrett has it checked it for fingerprints. They are not O'Neill's. They belong to an NID agent named Mark Devlin.

Carter and Barrett pay Devlin a visit, but his house blows up — a trap. They barely escape. Meanwhile, Teal'c and Jonas have narrowed the number of suspects with access to the mimic devices down to one Dr. Langham, who was supposed to have died in a car crash.

Jonas and Teal'c track Dr. Langham down and take him into custody at SGC, where he comes clean about stealing the mimic devices and delivering them to the NID splinter group, The Committee. The group is out to take the alien technology SGC has collected and use it for monetary gain, and will kill anyone in their way — even a U.S. senator. Dr. Langham gives Hammond the group-members' names in return for relocation to another world via the Stargate.

Major Carter decides to trust Agent Barrett with the intel on the mimic devices. He, in turn, trusts her with the fact that the senator is not dead but in a coma, under 24-hour guard, and that a Major Davis from the Pentagon is on his way there. But Davis is actually Agent Devlin, camouflaged as Davis so that he can kill the senator "again."

After completing his mission, Devlin reports back to The Committee, who instruct him to next threaten General Hammond's family and, if Hammond remains unintimidated, to kill him.

Just then, Agent Devlin morphs into Major Carter — who had used one of SGC's mimic prototypes to create a subterfuge and get the proof she needs to clear O'Neill. Carter and Barrett had apprehended Devlin earlier, and Carter had taken his place. Agent Barrett comes bursting in with his agents and takes The Committee into custody.

Kinsey makes a full recovery and exonerates O'Neill in public which, to O'Neill's displeasure, will ironically help get Kinsey elected president.

Source: SCIFI.COM Stargate SG-1