Sleuth is a 1970 play written by Anthony Shaffer. The Broadway production received the Tony Award for Best Play, and Anthony Quayle and Keith Baxter received the Drama Desk Award for Outstanding Performance. The play was adapted for feature films in 1972, 2007 and 2014. Best Play at the 25th Tony Awards, March 28, 1971 — hosted by Lauren Bacall, Angela Lansbury, Anthony Quayle, Anthony Quinn at Palace Theatre. Wiki link Wiki link