It's a Mystery, Charlie Brown
- .Yl: 1974
- Countryurt: United States of America
- Reanr: Animation, Comedy
- Studiýa: Lee Mendelson Film Productions, Bill Melendez Productions
- Açar söz: detective, dog, beagle
- Direktor: Phil Roman
- Aktrisa: Todd Barbee, Melanie Kohn, Stephen Shea, Donna Le Tourneau, Jimmy Ahrens, Lynn Mortensen