Amanda Tapping

Will (ROBIN DUNNE) is uncharacteristically absent from the morning team meeting. And his reason for not attending has him literally climbing the walls.

As a team of explorers prepares to unlock one of the final mysteries of the Stargate, their off-world base is viciously attacked. Also available on Amazon Instant Video

During an official visit by Senator Armstrong (CHRIS MCDONALD), his assistant Chloe (ELYSE LEVESQUE), and Eli Wallace (DAVID BLUE), a recently recruited gaming genius, to Icarus, a secret off-world military base, the base falls under a full force attack leaving Colonel Everett Young (LOUIS FERREIRA) with no choice but to retreat. He orders an evacuation to Earth. However, a last minute maneuver by scientist Dr. Nicholas Rush (ROBERT CARLYLE) thrusts the escapees headlong into his experiment, which transports everyone to deep space.

The survivors arrive on an uninhabited ship floating billions of light years away from Earth. Panic spreads throughout the group and Col. Young, who was severely injured during the escape, transfers command to Lt. Matthew Scott (BRIAN J. SMITH), before lapsing into unconsciousness. Teams led by Dr. Rush and Sgt. Greer (JAMIL WALKER SMITH) try to make sense of the situation, while Lt. Tamara Johansen (ALAINA HUFFMAN), a medic who was days away from leaving the program, is thrust into the role of chief medical officer. After secretly contacting the Home World Command using communications stones - a device which allows the swapping of consciousness between bodies across vast distances - Dr. Rush claims that he has been placed in charge by General O'Neill (RICHARD DEAN ANDERSON) and there is no hope of returning to Earth. When the ship's air supply systems begin to fail, his theories are challenged by Eli. As the crisis deepens, divisions emerge between those who want to attempt a return to Earth, including human resources executive Camille Wray (MING-NA), and those who want to remain aboard the Destiny.

Major General Jack O'Neill's mission to defend Atlantis fails as he and Richard Woolsey are taken prisoner during an Asuran assault on the city. Sheppard's team, Dr. Weir and Dr. Carson steal a Jumper from Stargate Command on Earth and come back to Pegasus galaxy with a plan to retake Atlantis.

"Behind The Mythology of Stargate SG-1" is an hour long documentary that gives the viewer a fascinating look into the way that the producers have incorporated earth based mythology into "Stargate SG-1."

While testing the new McKay-Carter intergalactic gate bridge, the Daedalus detects an Ancient Atlantian warship, traveling at just below light speed and heading towards Earth. Damaged in battle during the war with the Wraith, the Ancients aboard this ship fled the Pegasus galaxy and have spent thousands of years in stasis. Back on Atlantis, the now awoken Ancients meet with General O'Neill (Richard Dean Anderson) and Richard Woolsey (Robert Picardo). They thank the Stargate team for taking care of the city in their absence, but ask them to vacate Atlantis immediately. While Ronon and Teyla stay in the Pegasus galaxy, the remaining team members struggle to resume their lives on Earth. Sheppard (Joe Flannigan) doesn't gel with his new SG team, McKay (David Hewlett) is bored in his Area 51 lab, and Weir (Torri Higginson) has trouble finding meaning in a life after Atlantis. However, the SGC soon learns that the Replicators have overtaken Atlantis, as McKay had previously enabled the Replicators to re-write their own base code to override a safeguard preventing them from killing the Ancients that made them. Now, with O'Neill and Woosley trapped in Atlantis and General Landry (Beau Bridges) intent on protecting Earth by sending nuclear weapons through the gate to destroy Atlantis, the team must figure out a way to save O'Neill, Woolsey and Atlantis itself.

After rescuing SG-1 from hyperspace, the Asgard leader Thor asks SG-1 help fight the replicators that have overrun his home world. The replicators, box-like robots that have the ability to think and evolve, consume everything in their path with an instinctive thirst for the knowledge and experience of those they devour. Thor explains that the Asgard lured millions of the creatures to the planet in an attempt to slow their evolution with a time dilator. Instead the replicators used the device to speed up time, allowing them to evolve at an astonishing rate. SG-1 finds the planet paved in a layer of metal replicator bricks miles thick. Five humans confront the team and order Carter to stop tinkering with time dilator. When she refuses, the humans reveal that they are actually replicators that have "merged" with human forms. The replicator-humans, named First, Second, Third, Fourth and Fifth, disarm SG-1 and probe their memory banks, allowing them to see what the team is thinking at all times. Fifth, who seems sympathetic to SG-1, taps into Carter's mind where their communication can’t be intercepted and agrees to help the team escape in return for safe passage from the planet. Faced with the risk of unleashing an army of replicator-humans on an unsuspecting galaxy, the team has no choice but to trick Fifth into missing the ship. Carter reconfigures the time dilator and starts it up just as the replicators realize what’s happening. Fifth is captured, but the device quickly slows time to a standstill and allows SG-1 to escape. A replicator ship veers toward O'Neill and crew but it is consumed by the force field expanding outward from the time dilator as SG-1 heads for home.

When Gen. Hammond announces he is stepping down as head of Stargate Command, Col. Jack O'Neill suspects that there is more to Hammond's decision than he is letting on.

When Gen. Hammond announces he is stepping down as head of Stargate Command, Col. Jack O'Neill suspects that there is more to Hammond's decision than he is letting on. O'Neill is right; as he discovers, the National Intelligence Department (NID) — the quasi-governmental agency that, among other things, runs the classified Area 51 alien-research facility — was behind the change of command. Fed up with the general's inability to acquire alien technology through whatever means necessary, it pressured him into resigning. When Hammond's replacement, the hawkish Gen. Bauer, breaks up SG-1 and assigns Maj. Samantha Carter the task of building a planet-killing Naquadah bomb, O'Neill decides to take on the NID. However, O'Neill's only hope of restoring Stargate Command to its proper condition rests in the hands of a most unlikely ally: the traitorous Col. Maybourne.

A scientist experiments with adding Venusian DNA to his own. Also available on Xfinity

The origins of the mysterious mutant boy are revealed, as is the relationship between Magnus and her old flame, John Druitt.