Directed by: Frank Capra
Starring: Cary Grant, Raymond Massey, Jack Carson, Priscilla Lane
Character mistake: The plain clothes officer who arrives is referred to by his officers as "Lieutenant", but Mortimer calls him "Captain" more than once.
Suggested correction: This is a holdover from the play, where Mortimer makes that mistake and the lieutenant has to correct him.
Factual error: The movie opens on Halloween in Brooklyn. To show how crazy things were in Brooklyn, they show a baseball game being played by the Brooklyn Dodgers that day at Ebbetts Field and a big fight breaks out. The baseball season is and was over (including the World Series) well before Halloween. So there is no way they could be still playing on Oct 31st The only exception was in 2001 when games were postponed due to the 9/11 attacks and the season didn't end until November.
Aunt Martha: For a gallon of elderberry wine, I take one teaspoon full of arsenic, then add half a teaspoon full of strychnine, and then just a pinch of cyanide.
Mortimer Brewster: Hmm. Should have quite a kick.
Trivia: The character of Jonathan is referred to several times in the film as a thug who "looks like Boris Karloff." This was an in-joke referring to the fact that Karloff played the role of Jonathan in the original Broadway production of Arsenic and Old Lace..