Stargate Atlantis Episode Details!

Episode 5x04 "The Daedelus Variations"

Colonel Sheppard's team finds the Earth ship Daedalus abandoned. As McKay works to restore power, Teyla finds a recording in the computer -- the final entry of the ship's log.It is Captain Sobol, apparently the commander of the Daedalus, who reports that equipment and supplies have been transported down to the planet's surface, where he and his crew hope to survive long enough to be found and rescued. Sobol plans to soon join them in an F-302 fighter.The crew's predicament and the reason for their evacuation, however, is not the first question that Sheppard the team have. The first question is ... Who is Captain Sobol?

Source: Gateworld