The Blue Angel

Professor Immanuel Rath (Curt Jurgens)is a martinet botany professor at a German high school who finds post cards bearing the likeness of Lola-Lola (May Britt), "The Blue Angel", in the possession of his pupils. He goes to the cafe where she is appearing to see if any of his pupils are there, and spots two of them. While chasing them, he encounters Lola-Lola and the troupe manager, Kiepert (Theodore Bikel.) He returns the next evening and becomes involved with Lola. (imdb)