Star Trek: Enterprise season 5 left behind a 20-year-old mystery that Star Trek: Section 31 failed to answer or connect to. Enterprise was canceled in season 4 by UPN, but not before a memorable two-episode jaunt into the Mirror Universe. Enterprise season 4's "In a Mirror, Darkly" revealed how Captain Jonathan Archer's (Scott Bakula) bid to gain power in the Terran Empire was foiled by his own mistress, who declared herself Empress Hoshi Sato (Linda Park).