It's a Bird... It's a Plane... It's Superman! (1975)

A Broadway musical that had a deservedly short run got the TV treatment, eliminating the few interesting moments, but adding some parts and keeping most, if not all, the songs. The main character of the play is not Superman/Clark Kent, but a rival reporter. The villain is Lex Luthor-like, but not him and there's a lot of Chinese henchmen played by Caucasians. The supporting cast is remarkable: Loretta Swit, Lesley Ann Warren, David Wayne, Phil Leeds, Harvey Lembeck, Allen Ludden, Al Molinaro and has Gary Owens narrating. There's a cute inside joke about the original cartoonists of the comic strips, but the performances are weak musically (Warren and the main - forgotten - actor excepted) and the songs aren't memorable, which leaves the plot and characters, which are barely there.