At a beach party, Lois hits her head when she jumps into the lake and a mysterious swimmer comes to her rescue, out-swimming a baffled Clark.
Gabriel warns Chloe that he is going to set off a missile and obliterate all of Smallville; Lex believes that Lionel has the key to open Clark's spaceship.
During an investigation, Mulder and Scully discover a scientist at a chemical testing plant is missing following a freak accident.
Andromeda encounters a damaged sister ship, and embarks on an eerie mission.