Leon Belasco was born on October 11, 1902 in Odessa, Kherson Governorate, Russian Empire [now Ukraine] as Leonid Simeonovich Berladsky. He is known for his work on Philo Vance Returns (1947), Bomba and the Hidden City (1950) and My Sister Eileen (1960). He was married to Laureine Back (dancer). He died on June 1, 1988 in Orange, California, USA.