Tonight’s theme on TCM is “Blind Ambition” – and while it’s not showing the 1979 TV miniseries by that name, which starred Martin Sheen as central Watergate figure John Dean (with Rip Torn as Nixon!), it is showing a small collection of films featuring single-minded, ruthless, Iago-like antagonists. First up is one of the best: this 1950 backstage drama, in which Bette Davis plays a movie star whose adoring fan turns out to be scheming to steal the star’s career – and even her lover. George Sanders and Gary Merrill co-star, and Anne Baxter plays the scheming young woman.