It's a Mystery, Charlie Brown
- Urtea: 1974
- Herrialdea: United States of America
- Generoa: Animation, Comedy
- Estudioa: Lee Mendelson Film Productions, Bill Melendez Productions
- Hitz gakoa: detective, dog, beagle
- Zuzendaria: Phil Roman
- Aktoreak: Todd Barbee, Melanie Kohn, Stephen Shea, Donna Le Tourneau, Jimmy Ahrens, Lynn Mortensen