Prodigy (S04E19)

During a visit to the Air Force Academy, Maj. Samantha Carter makes the acquaintance of Jennifer Hailey, a promising young cadet with a rebellious streak. Carter sees great potential in her, but Jennifer seems determined to sabotage her future with the Air Force. She is fiercely independent, opinionated and resentful of Carter, to whom she is constantly being compared. On the other hand, she is brilliant, and Carter recognizes that, given time, Jennifer will prove to be a formidable asset to Stargate Command. Eventually, Carter decides to show Jennifer exactly what she can look forward to if she stays the course — by bringing her through the stargate. They visit an offworld research base, where Col. Jack O'Neill and Teal'c are on security detail, "babysitting" a group of ungrateful scientists. The seemingly routine excursion takes a deadly turn when the team is attacked by alien life-forms composed of pure energy. Trapped and cut off from the stargate, SG-1 must make a desperate gamble to reach safety. (Note: Appearing as himself is Gen. Michael E. Ryan, who retired Oct. 1, 2001, as Chief of Staff of the U.S. Air Force. The general, a science-fiction fan, said he agreed to guest-star on Stargate SG-1 because, "The ideas that come out of science fiction are often more science than fiction.") (Metro-Goldwyn-Mayer (MGM))