The film simply titled Superman opened December 15th 1978.
Superman Returns was released on 06/28/2006.
Superman II was released on 06/19/1981.
Superman III was released on 06/17/1983.
He Was Superman From Superman I-IV. Superman I Was Released In 1978 And IV In 1987 Making A Total Of 9 Years.
Superman - 1996 Superman's Pal 3-8 was released on: USA: 20 February 1999
Superman and the Mole Men, starring George Reeves, released in 1951
Tesla the Superman - 2009 was released on: USA: 2009
Adventures of Superman - 1952 The Superman Silver Mine - 6.6 was released on: USA:10 March 1958
Adventures of Superman - 1952 The Defeat of Superman 2-6 was released on: USA: 24 October 1953
Adventures of Superman - 1952 The Wedding of Superman 4-8 was released on: USA: 12 May 1956
Adventures of Superman - 1952 The Perils of Superman 6-12 was released on: USA: 21 April 1958
Adventures of Superman - 1952 Superman Week 3-4 was released on: USA: 14 May 1955