The Bat is a three-act comedy-mystery play by Mary Roberts Rinehart and Avery Hopwood that was first produced by Lincoln Wagenhals and Collin Kemper. The play opened on Broadway on August 23, 1920. At a rented summer home, Cornelia Van Gorder and guests search for stolen money while being stalked by a masked criminal known as "the Bat". The play originated as an adaptation of Rinehart's 1908 mystery novel The Circular Staircase. It was a critical and commercial success, running for 867 performances in New York and 327 in London, with tours by several road companies. It was revived twice on Broadway, in 1937 and 1953. It had several adaptations, including a 1926 novelization credited to Rinehart and Hopwood but ghostwritten by Stephen Vincent Benét. Three film adaptations were produced: The Bat (1926), The Bat Whispers (1930), and The Bat (1959). The play and its adaptations inspired other comedy-mysteries with similar settings, and influenced the creation of the comic-book superhero Batman.