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The Mumbly Cartoon Show is a Saturday morning animated series produced by Hanna-Barbera Productions and featuring the titular Mumbly, a cartoon dog detective. It was broadcast on ABC from September 11, 1976, to September 3, 1977, as part of The Tom and Jerry/Grape Ape/Mumbly Show. This compilation packaged reruns of the 1975 The Tom and Jerry/Grape Ape Show with Mumbly as a new component.

Mumbly is a private eye dog in a trenchcoat, who worked with a human detective, Chief Schnooker, to catch criminals who often sported alliterative names.[1] 16 episodes were produced.[2] Mumbly was voiced by Don Messick, and Schnooker by John Stephenson.[3]

The show was not a ratings success and only lasted for one season. However, in the next season, Mumbly was included in Hanna-Barbera's crossover show, Laff-A-Lympics, on the villainous "Really Rottens" team. Mumbly was not a villain in his earlier show, but the character was a substitution for the actually-villainous Muttley from the 1969 series Dastardly and Muttley in Their Flying Machines, who couldn't appear on Laff-A-Lympics as those characters were co-owned by Heatter-Quigley Productions.

The show was also broadcast in foreign countries like West Germany in 1982, Yugoslavia circa 1985/1986, France in 1978, Poland circa 1983/1984.

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