This was rescued from the ancient vintage ComicBookResources’ Apr 20, 1999 TV Themes website. Incredibly a lot of the sound-files are now on the Internet Archive Wayback Machine servers and are not just dead links so they are available for download.

Television Show Length File Format
1966 Aquaman Animated Theme 29 secs. WAV Real Audio
1966 The Atom Animated Theme 30 secs. WAV Real Audio MP3
1966 Batman Live Action Theme 58 secs. WAV Real Audio
1968 Batman & Robin Animated Theme 59 secs. WAV Real Audio MP3
1996 The Adventures of Batman & Robin 58 secs. WAV Real Audio
1997 The Batman/Superman Adventures 60 secs. WAV Real Audio MP3
1999 Batman Beyond New! 60 secs. WAV Real Audio MP3
1993 Cadillacs & Dinosaurs Theme 60 secs. WAV Real Audio MP3
1966 Captain America Animated Theme 18 secs. WAV Real Audio Real Movie
1979 Captain America Live Action Theme 47 secs. WAV Real Audio MP3
1967 Fantastic Four Animated Theme 56 secs. Real Movie
1978 Fantastic Four Animated Theme 58 secs. WAV Real Audio MP3
1978 Fantastic Four Animated Closing Theme 30 secs. WAV Real Audio MP3
1997 Fantastic Four Animated Theme 60 secs. WAV Real Audio MP3
1966 The Flash Animated Theme 30 secs. WAV Real Audio MP3
1990 The Flash Pilot Closing Theme 60 secs. WAV Real Audio
1990 The Flash Opening Theme 60 secs. WAV Real Audio MP3
1966 Green Lantern Animated Theme 30 secs. WAV Real Audio MP3
1966 Incredible Hulk Animated Theme 24 secs. WAV Real Audio MP3 Real Movie
1977-82 Incredible Hulk Live Action Theme 70 secs. WAV Real Audio
1982 Incredible Hulk Animated Theme 60 secs. WAV Real Audio MP3
1996 Incredible Hulk Animated Theme 60 secs. WAV Real Audio MP3
1966 Iron Man Aninated Theme 19 secs. WAV Real Audio Real Movie
1994 Iron Man Animated Theme 60 secs. WAV Real Audio MP3
1996 Iron Man Animated Theme 45 secs. MP3 Real Movie
1993 Lois & Clark Commercial Stinger 6 secs. WAV Real Audio
1993 Lois & Clark Theme 60 secs. WAV Real Audio MP3
The Mask Animated Theme 58 secs. WAV Real Audio
1997 Men In Black Animated Theme 60 secs. WAV Real Audio MP3
1966 Namor The Sub-Mariner Theme 18 secs. WAV Real Audio MP3 Real Movie
1997 Nightman Live Action Theme 64 secs. WAV Real Audio MP3
1979 Plastic Man Theme 59 secs. WAV Real Audio
1997 Richie Rich Theme 60 secs. WAV Real Audio
1996 Savage Dragon Theme 60 secs. WAV Real Audio
1941 Shazam “The Adventures of Captain Marvel” 79 secs. WAV Real Audio MP3
1974 Shazam Live Action Theme 59 secs. WAV Real Audio
1981 Shazam Animated Theme 85 secs. WAV Real Audio MP3
1997 Spawn Animated Theme 50 secs. WAV Real Audio
1967 Spider-Man Animated Theme 63 secs. WAV Real Audio MP3 Real Movie
1981 Spider-Man Live Action Theme 60 secs. WAV Real Audio
1981 Spider-Man Theme (Solo) 61 secs. WAV Real Audio
1981 Spider-Man & His Amazing Friends Theme 57 secs. WAV Real Audio MP3
1996 Spider-Man Animated Theme 60 secs. WAV Real Audio
1979 Spider-Woman Animated Theme 60 secs. WAV Real Audio MP3
1979 Spider-Woman Animated Closing Theme 29 secs. WAV Real Audio MP3
1966 Superboy Cartoon Theme Resampled 30 secs. WAV Real Audio MP3
Superboy Live-Action Theme – Season 1 40 secs. WAV Real Audio
Superboy Live-Action Theme – Season 2 40 secs. WAV Real Audio
Superboy Live-Action Theme – Seasons 3 & 4 45 secs. WAV Real Audio
1973 Superfriends Theme 61 secs. WAV Real Audio
197? Superfriends Theme – 8bit/8khz/Mono 45 secs. WAV Real Audio
1983 Superfriends Theme 60 secs. WAV Real Audio
1941 Fleisher Superman Animated Theme 86 secs. WAV Real Audio MP3
1942 Fleisher Superman Animated Theme 77 secs. WAV Real Audio MP3
1943 Fleisher Superman Animated Theme 75 secs. WAV Real Audio MP3
1941 Fleisher Superman Animated Theme – Spanish 60 secs. WAV Real Audio MP3
1951 The Adventures of Superman Theme 35 secs. WAV Real Audio
1968 Superman Cartoon Theme 53 secs. WAV Real Audio MP3
1987 Superman Animated Theme 30 secs. WAV Real Audio
1987 Superman Animated Theme – Version 2 60 secs. WAV Real Audio
1996 Superman: The Animated Series 60 secs. WAV Real Audio MP3
1990 Swamp Thing Cartoon Theme 60 secs. WAV Real Audio
1990 Swamp Thing Cartoon Theme – Version 2 59 secs. WAV Real Audio MP3
1996 Swamp Thing TV Series Theme 60 secs. WAV Real Audio
1966 Teen Titans Animated Theme 30 secs. WAV Real Audio MP3
1990 Teenage Mutant Ninja Turtles Cartoon Theme 59 secs. WAV Real Audio
1966 Thor Animated Theme 24 secs. WAV Real Audio MP3 Real Movie
1994 Tick Animated Theme 30 secs. WAV Real Audio MP3
1996 WildC.A.T.S. Theme 60 secs. WAV Real Audio MP3
1975-79 Wonder Woman Theme 88 secs. Real Audio
1983 X-Men: Pryde of the X-Men Theme 33 secs. WAV Real Audio MP3
1995 X-Men Animated Theme 59 secs. WAV Real Audio MP3
1997 X-Men Animated Theme 30 secs. WAV Real Audio

These files, at least the ones that still function, are over 11 years old. I wonder how long until these little electromagnetic artifacts degrade.

No computer file lasts forever.