When does Dastardly and Muttley in Their Flying Machines return?

The show focuses on the efforts of Dick Dastardly and his canine sidekick Muttley to catch Yankee Doodle Pigeon, a carrier pigeon who carries secret messages. The peppy and memorable theme song by William Hanna and Joseph Barbera has a chorus that repeats the phrase "Stop the pigeon" seven times in a row. The title is a reference to the film Those Magnificent Men in Their Flying Machines.