Laetus, Marcia, and one athlete – assassin of Roman emperor Commodus Planner: Laetus Assassins: Marcia and an unnamed athlete who strangled the emperor in his bath when Marcia's poison worked too slowly.
... all of which were at the far end of the Metropolitan Line, and stretch the definition of "tube station" a little:
Waddesdon tube station[?]
Quainton Road tube ...