On the list! Super brains were a thing then, Billion Dollar Brain, Colossus, and much later, The Machine. 😛
If you like theatre, suspense, and a highly active screenplay, Deathtrap has it all. Once acclimatised to the rhythm of Lumet’s direction, you won’t be switching off. The article mentions the earlier Sleuth, one for Caine fans too. Recommended.
