Tony Award-winning play by English playwright Anthony Shaffer. Adapted to film in 1972 (starring Laurence Olivier and Michael Caine) and 2007 (starring Michael Caine and Jude Law).

The play was revived for a 2024 UK tour, starring Todd Boyce (Coronation Street's notorious baddie, Stephen Reid) and Neil McDermott (EastEnders, The Royal), directed by award-winning Rachel Kavanaugh (The RSC/Chichester Festival Theatre).