Trivia: This is the only episode in the entire series where the victim is attacked but is later revealed to be still alive.
Trivia: The song Angela Lansbury sings, "Little Yellow Bird," when she plays musical hall performer Emma, is the same song she sang in the 1945 film The Picture of Dorian Gray, when she played music hall performer Sybil Vane.
Trivia: Angela Lansbury is the only actress to appear in all 264 episodes of the show.
Trivia: During the Revolutionary War era, Maine was part of Massachusetts, even though it was physically separated from Massachusetts proper by New Hampshire. Maine did not become a separate state until 1820.
Trivia: The name of the horse, "Anchors Ahoy," is meaningless and silly. The term, "anchor's aweigh," is short for "the anchor is aweigh," meaning the anchor has been pulled free of the bottom. However, "ahoy" is a hailing call, used to attract the attention of another vessel or, perhaps, a person, and requires an answer. (It's kind of like saying, "Hey, you!") Since anchors are inanimate objects, they can neither hear nor respond to the call.
Suggested correction: It's the name of a horse! Registered purebred horses have all sorts of odd, silly, meaningless names that are personal to the owner. The names don't have to make sense. Also, two registered horses cannot have the exact same name, so it could be argued that the name "Anchors Aweigh" was already taken and this was an alternative choice. Additionally, some registered horses have names that are a variation of their sire or grandsire's name. "Anchors Ahoy" could be related to another horse named "Anchors Aweigh."