"Caught" isn't really a film noir notwithstanding the dramatic scenes in a darkened mansion. It's more a psychological exploration of a gold digger's conversion from pursuit of the rich to love of the pure. Barbara Bel Geddes is very effective as an attractive but poor working class girl not blessed with beauty but guided by a desire for opulence.
Before she can meet the love of her life she allows herself to be swept off her proletarian clods by Robert Ryan who once again is nearly perfect as a character exhibiting crass ruthlessness topped off by a nice dollop of madness. James Mason is a very human M.D., far more likable than the saccharine-sweet screen doctors of the past. He's a pediatrician I wouldn't have minded having when I was a kid.
What is surprising is the ending of this film, one that would be inconceivable today and must have seemed weird to many, particularly women, even then. Of course I won't reveal the resolution but "Caught" is a film very available for rental and well worth the less than ninety minutes it takes to watch an excellent cast tell a good story.