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Charles William Mumy "Bill" Mumy Jr. is an American actor, comedian, and musician best known for his roles as Will Robinson in Lost in Space, and Anthony Freemont in The Twilight Zone episode "It's a Good Life". He is also the father of actress Liliana Mumy. For Disney, he played the role of Freddy Gray in For the Love of Willadean and Sterling North in Rascal.