Monster of London City

The fine line between drama and real life is crossed with tragic results in this German horror mystery film that is set in modern London and centers on a stage production of Jack the Ripper's life. During the run of the play, a series of murders, eerily similar to Jack's, occur. This doesn't bother the lead actor too much until he discovers that his fake knife has been replaced by a real one during a performance. Horrified, he flees the theater... (allmovie.com)