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: At the beginning of this episode, after the Crypt Keeper causes the mirror to break, he mentions that he just bought seven years of bad luck. This show lasted for seven years.