Opened at the Royal Theatre on November 12, 1970. Closed October 13, 1973 after 1,222 performances — 2.9 years. A Tony Award in 1971, Best Play 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. Wiki link