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Granet worked with Desilu Productions and was instrumental in getting Rod Serling's The Twilight Zone on the air in the late 1950s when he produced his successful pilot pitch The Time Element for Westinghouse Desilu Playhouse. Granet served as the show's producer during its fourth and fifth seasons. He also produced the series The Untouchables.
Granet died of injuries from a fall in 2002 at age 92.