Revenge of the Evil Leaper - September 16, 1987 - S5-E17
Trivia: Thames, the third leaper, leaps in and out of scenes using the Star Wars blaster sound effect.
Trivia: Poirot in the ship's lounge is reading the actual May 1st 1935 issue of Bystander (recognizable by the cover and with the correct page order, does not seem to be a simple movie prop), roughly consistent with the time frame of the first season and a contest taking place on the 14th. (00:07:50)
Trivia: Jaleel White broke and permanently disfigured his right-hand pinky finger while filming this episode.