Robert Marcus is an American television writer and producer. not much is known about his life and career, but he wrote episodes of "McHale's Navy," "The Lucy Show," "The Donna Reed Show," "Tammy," "Gilligan's Island," "Petticoat Junction," "Green Acres," "Bewitched," "Please Don't Eat the Daisies," "I Dream of Jeannie" and "Julia."