I have seen this movie dozens of times on TV. The problem is they always cut out a lot of the little nuances that make the movie fun; sometimes it is crucial to the story. Now you can see the whole story in its entirety. Lots of sight gags and relies on many expressions to convey what they are thinking.
If this looks like a play, that is because it is a play. It was written by Joseph Kesserling and opened in New York City 10 JAN 41. It ran for 1,444 performances. Boris Karloff was an investor and the star attraction so he could not be released for the movie.
The story takes place all on Halloween night in Brooklyn. Mortimer Brewster (Cary Grant) a critic, that wrote a scathing book about the negatives of marriage, gets married. He soon finds out about his families past and where the bodies are buried. Soon he is to be visited by his estranged or just strange brother (Raymond Massey). Seems that his brother and his brother's partner, Dr. Einstein (Peter Lorre), has some little says that it is perfect to get the right person for it baby