"Mr. Pim Passes By" is a comedy play in three acts written by A.A. Milne. The play revolves around the character of Mr. Pim, a man who unexpectedly arrives at the Marden household and begins to unravel their previously quiet and ordinary lives. Mr. Pim’s arrival sets off a chain of events that leads to confusion, misunderstandings, and ultimately, a realization of what is truly important in life. The play deals with themes of love, honesty, and the unexpected twists and turns that life can take. "Mr. Pim Passes By" was first performed in London in 1919 and became one of Milne’s most successful plays.