M*A*S*H movie begot M*A*S*H the TV series which spun off Trapper John MD.
Interesting... this can start a new thread, actually:
Movie to TV Spin-offsBut I think we can keep it here, instead.
Here are a few off the top of my head:
1. Alice Doesn't Live Here Anymore -> Alice
2. Look Who's Talking -> Baby Talk
3. Working Girl -> Working Girl
4. 9 to 5 -> 9 to 5
5. A Nightmare on Elm Street -> Freddy's Nightmares
6. Friday the 13th -> Friday the 13th (though unrelated in plotline)
7. Planet of the Apes -> Planet of the Apes
8. Cruel Intentions -> Manchester Prep (edited together/reshot for video as "Cruel Intentions 2")
9. Buffy The Vampire Slayer -> Buffy The Vampire Slayer
10. Highlander -> Highlander and Highlander: The Raven
11. Beastmaster -> Beastmaster
12. Clueless -> Clueless
13. Harry and the Hendersons -> Harry and the
Hendersons
14. Animal House -> Delta House
15. Practically every Disney cartoon -> animated series and direct-to-video sequels.
Anyone want to try the reverse?
From TV to movies... there are tons, as I'm sure the trekkers know...