as Jonathan: Replaced Boris Karloff, who was not released from his stage contract for the film.

: Based on the 1939 play by Joseph Kesselring, the film retains a fast-talking, door-slamming energy that keeps the 118-minute runtime moving at a breakneck pace.

: Mortimer’s sociopathic, escaped-convict brother who has undergone botch plastic surgery (by the alcoholic Dr. Einstein ) that makes him look like horror icon Boris Karloff. Cast and Characters

as Mortimer Brewster: Grant famously disliked his own performance, calling it "over-acting," though critics often cite it as a masterclass in physical comedy.

: The film is a rare Capra project that avoids his usual "social consciousness" (as seen in Mr. Smith Goes to Washington ) in favor of "good old-fashioned theater".

as Abby and Martha: Both actresses reprised their roles from the smash-hit Broadway play.

The story follows (Cary Grant), a drama critic and famous bachelor who finally gets married on Halloween. When he returns to his family’s ancestral Brooklyn home to tell his aunts—the sweet and seemingly charitable Abby and Martha —the news, he makes a grisly discovery: a dead body hidden in the window seat.

as Elaine Harper: Mortimer’s increasingly frustrated new bride. Key Themes and Production