Stargate Sg1, The First Ones

S4 E1 • 42m • HDPG

SG-1 must face and destroy the replicators that have made their way to Earth.

S4 E2 • 42m • HDPG

SG-1 responds to a plea for help from a civilisation that has traced its roots back to Earth.

S4 E3 • 42m • HDPG

Anise conducts an experiment on the team members using the Atoneikan armbands which promises enhanced ability.

S4 E4 • 42m • HD12

An incoming traveller, identified as a Jaffa priestess with whom Teal'C once had a relationship, claims to know how to destroy the Goa'uld.

S4 E5 • 42m • 18

SG-1 fear that they may have fallen victim to an untraceable Goa'uld method of mind control.

S4 E6 • 42m • PG

During one of the funniest episodes ever made, Jack O'Neill and Teal'c relive the same day over and over after being exposed to a strange alien device.

S4 E7 • 42m • PG

When the Russians discover a stargate, they turn to SG-1 for help.

S4 E8 • 42m • 18

Daniel Jackson is captured after an archaeological dig leads to the discovery of a primordial Goa'uld symbiote.

S4 E9 • 42m • PG

SG-1 find themselves caught between two civilisations attempting to colonise the same planet.

S4 E10 • 42m • PG

SG-1 awaken in a mine with no recollection of their former lives. Jonah, Therra, Carlin and Tor - as they are now known - seem to have a new set of memories.

S4 E11 • 42m • PG

Colonel O'Neill meets a strange man who inexplicably possesses intimate knowledge of the Stargate programme.

S4 E12 • 42m • PG

A test flight of a recovered Goa'uld death glider goes awry, sending Teal'c and O'Neill hurtling into space.

S4 E13 • 42m • PG

After the death of his mentor, Daniel Jackson is reunited with a friend and a foe from his past.

S4 E14 • 42m • 18

SG-1 undertakes a mission to disrupt a possible alliance between two powerful system lords.

S4 E15 • 42m • 18

All at the SGC are shocked when General Hammond announces his retirement.

S4 E16 • 42m • PG

Ten years have passed since an alien race known as the Aschen saved Earth and cured cancer but Carter discovers the awful truth behind this seemingly infallible race.

S4 E17 • 42m • 18

SG-1 notice a change in Daniel Jackson after he is reunited with the Harsesis child, Shifu (Lane Gates).

S4 E18 • 42m • PG

SG-1 travels to a planet where they find themselves transfixed by a beautiful but deadly device.

S4 E19 • 42m • PG

Carter tries to motivate a promising young cadet by taking her through the Stargate. But a seemingly routine excursion turns deadly when they are attacked by aliens.

S4 E20 • 42m • PG

The SGC finds its computer systems under the control of a mysterious force, which then completely takes over Carter's head.

S4 E21 • 42m • 18

In an episode that marks the directorial debut of Michael Shanks, problems arise for SG-1 when an old acquaintance comes looking for help.

S4 E22 • 42m • 18

The Tok'ra reunite with SG-1 when the team steals a Goa'uld mother ship.