The Adventures of Sir Lancelot is a British television series first broadcast in 1956, produced by Sapphire Films for ITC Entertainment and screened on the ITV network. The series starred William Russell as the eponymous Sir Lancelot, a Knight of the Round Table in the time of King Arthur at Camelot.

Charles Hathaway wakes up in West Wales with no recollection of who he is or how he got there. With the help of a Cardiff specialist he traces his life back to his gorgeous wife and their large London house, so all seems well with the world. But more detective work starts to uncover an alarming chain of further stunning wives and a way of going on that the new Charles finds pretty unacceptable.