This morning I saw the remake of "Sleuth." Like the original, it stars Michael Caine, but this time he plays the role of the older man, a mystery writer whose visit from his wife's young, handsome lover turns into a battle of wits and power. In 1974, the older man was played by Laurence Olivier. In 2007, the younger man is played by Jude Law, took over another of Caine's iconic roles in "Alfie." The original was an entertaining potboiler with one of theater and movie history's cleverest surprises (incomprehensibly omitted from the new version). In 2007, it gets a high literary sheen with a new screenply by Harold Pinter and direction, in between Shakespeare adaptations, from Kenneth Branaugh.
The play was written by Anthony Shaffer, identical twin brother of Peter Shaffer, who wrote "Equus" and "Amadeus." The themes of competition, identity, and duality run through the work of both brothers. I think their story would make quite a movie.