The 59th episode of the prequel spinoff Star Trek: Enterprise airs on UPN. 
While investigating an orderload in the starboard warp nacelle systems, Captain Archer and T’Pol encounter an unusual spatial anomaly, and Archer is overcome by it after pushing his science officer out of the way. Archer awakens in the sick bay of the Enterprise, told by Dr. Phlox that a parasitic infection he contracted is preventing him from retaining any short-term memory. After this condition makes it apparent that Archer is unfit for duty, T’Pol is made the ship’s Captain. Phlox attempts a more aggressive treatment, and when Archer awakens from it, an older T’Pol tells him that twelve years have passed – none of which he can remember – during which the Xindi have destroyed Earth and are now systematically hunting down the last 6,000 surviving humans who escaped the planet’s destruction.
written by Michael Sussman
directed by Robert Duncan McNeill
music by Dennis McCarthyCast: Scott Bakula (Captain Jonathan Archer), Jolene Blalock (Subcommander T’Pol), John Billingsley (Dr. Phlox), Dominic Keating (Lt. Malcolm Reed), Anthony Montgomery (Ensign Travis Mayweather), Linda Park (Ensign Hoshi Sato), Connor Trinneer (Commander Charles “Trip” Tucker III), Gary Graham (Soval), Brett Rickaby (Yedrin Koss), Richard Anthony Crenna (Security Guard)
LogBook entry by Earl Green