A scientist working on advanced propulsion technology is killed by a disabled janitor, Roland, who then corrects the man's calculations.
Mulder and Scully search for the truth when an anthropologist discovers what could be the frozen remains of extraterrestrial life.
Rodrigo wants Victory to meet his daughter; Nico asks Kirby to be her date at a charity event; Wendy's problems with Maddie get worse.
Clark finds himself in a psychiatric hospital where he discovers he's been suffering from delusions that he comes from another planet and has superpowers.
When a woman is found in suspended animation, the team is shocked to discover it is Dr Weir herself, who tells them of her trip 10,000 years into Atlantis's past.