05.04 Episode 92
Airdate: July 20, 2001

On P7S-441, SG-1 is under attack by Jaffa. Tyler has been wounded, and O'Neill has gone back for him. Now the two are pinned down, and Carter, Daniel, and Teal'c are ordered to return through the gate to bring reinforcements. Arriving at the SGC, they urgently request a rescue mission for O'Neill and Tyler, until Hammond insists that no Lieutenant Tyler exists. No one can explain why only SG-1 seems to be aware of Lieutenant Tyler, but Carter, Daniel, and Teal'c are confined to the infirmary for evaluation, while O'Neill remains trapped on the planet with a teammate who may not exist.

As Hammond organizes an aerial search of the planet by UAV, and Carter begins a search of her own through the base computers, Colonel Simmons returns from the Pentagon with orders to conduct an investigation into the possible security compromise of SG-1. Daniel, Teal'c, and Carter are each brought before Simmons for interrogation, but the sessions prove fruitless. It is Dr. Fraiser who discovers an important clue in a residue found on Teal'c's jacket. As she touches it, she too begins to remember Lieutenant Tyler, and her analysis suggests that Tyler is simply an anomaly, the result of a chemical suggestion.

On the planet, as the Jaffa close in, Tyler confesses to O'Neill his true nature. He is Reol, a race that uses a chemical defense mechanism which causes a sense of familiarity, and which is sought by the Goa'uld. The confession no longer matters, however, as O'Neill and Tyler engage the Jaffa in battle side by side, just as SG-1 returns with support. Tyler tries to surrender to the Jaffa to provide SG-1 with a means of escape, but SG-1 does not leave their people behind. A final ambush of the Jaffa rescues Tyler, and allows safe access to the gate, and home.

Written by: Joseph Mallozzi and Paul Mullie
Directed by: Peter DeLuise

Guest Starring: Dion Johnstone as Lieutenant Tyler, Gary Jones as Technician, John de Lancie as Colonel Frank Simmons, Teryl Rothery as Dr. Fraiser, Karen van Blankenstein as Nurse, Brad Kelly as Jaffa, Shawn Stewart as Jaffa, Dario DeIaco as Jaffa

Reference: Kaiael, Nurse, P7S-441, Reol, Reol Chemical, Frank Simmons, Lieutenant Tyler, UAV, Weapons, Wing Cannon



Lieutenant Tyler