Everett Greenbaum
Everett Greenbaum was an American television and film writer and actor who contributed to such shows as The Andy Griffith Show , Mash , Love American Style, The Real McCoys , Sanford and Son, and The George Gobel Show. Greenbaum was a cocreator with Jim Fritzell of Mister Peepers an important early television show which starred Wally Cox. He wrote the Hollywood feature film Good Neighbor Sam, as well as a series of films starring Don Knotts that included The Shakiest Gun in the West, The Reluctant Astronaut, and The Ghost and Mr. Chicken.
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Source: Wikipedia