Perry Mason - Season 3 - Eps 25: The Case of the Irate Inventor
James Frazer wants a divorce and his cheating wife refuses to give him one. She's also stealing the plans to his invention in order to bait her engineer lover into staying around. Frazer leaves town for three months in order to cool down but on the night of his return he finds his wife murdered in his office and he has the only key to a unique burglar proof lock that he invented.
About Perry Mason

Title: Perry Mason
First Air Date: 1957-09-21
Last Air Date: 1966-05-22
Status: Ended
Rating: 7.7/10 (from 123 votes)
Language: EN
Seasons: 10
Total Episodes: 271
Network: CBS
Genres: Mystery, Drama, Crime
Production Companies: Paisano Productions, TCF Television Productions, CBS
Synopsis
The cases of master criminal defense attorney Perry Mason and his staff who handled the most difficult of cases in the aid of the innocent.
Cast

Raymond Burr
Perry Mason

Barbara Hale
Della Street

William Hopper
Paul Drake

William Talman
Hamilton Burger

Ray Collins
Lieutenant Tragg