 After 1933 with the widespread use of sound film, Morton's career began to lose momentum; and by 1936 his roles were significantly reduced, playing minor roles on television until his death from heart disease in 1966.Even though Morton's career continued into the mid-1960s, almost all of his roles after 1933 were so minor he was left uncredited for the majority of his performances.He died at the age of 58, was cremated and his ashes interred in an unmarked grave in Valhalla Memorial Park, North Hollywood, Los Angeles County, California, in Block G, Section 6755, Lot 1.