Perry Mason - Season 5 Episode 28
The Case of the Ancient Romeo

Perry and Della go out for a night at the theatre to see Perrys actor friend, Steve Brock, perform as Paris in Romeo and Juliet. The lights mysteriously go out during the dueling scene between Romeo and Paris and when the lights are restored the audience is shocked to see that leading man Franz Lachman, playing Romeo, has been stabbed to death. When Steve is accused of the murder Perry decides to have the cast re-enact the final scene that was played before Lachmans death.