"Mr. Pim Passes By: A Comedy in Three Acts" by A. A. Milne is a three-act comedy first produced in 1919. When the absent-minded Mr. Pim visits a respectable English household, his faulty memory drops a bombshell: the wife's first husband, believed dead in Australia, may still be alive. This revelation threatens to unravel the couple's marriage and expose them as unwitting bigamists. As legal propriety clashes with genuine affection, the household must navigate questions of duty, love, and what truly makes a marriage valid. (This is an automatically generated summary.)