The first live-action movie version of Superman starred Kirk Alyn as the Man of Steel in a 15-part serial in 1948. A 1950 sequel, Atom Man vs. Superman, also starred Alyn and consisted of 15 parts. Both serials will be released for the first time ever on DVD November 28, along with all other Superman movies.
4 discs (over 8 hours)
Superman (15-part 1948 serial)
Atom Man vs. Superman (15-part 1950 serial)
Saturdays with Superman: A Look Back at the First Live-Action Superman documentary
Information Source: Amazon