 CHAR: Marvin, a supposedly devout Star Trek fan, says that a Star  Trek memorabilia store had "a tricorder used by Ensign Riley in The  Doomsday Machine." This is a reference to Kevin Riley, who was a  Lieutenant, not an Ensign. He also only appeared in two episodes of  the first season of the original series Star Trek, "The Doomsday  Machine" episode was produced in the second season of the show.