Answer: They're movies that inspired TV shows.
This was pretty tricky, it seemed, and I was more strict about it than "usual". A lot of people put down that they're movies and TV shows, which is true, but that's really too general and "easy". The key is that they were first movies which inspired the TV shows.
So only DarthFerret, EricBess, and Ransac got it right.
Melkor, mythosx, Oversoul, rokapoke, sageridder, TomB, and train all answered but missed it, one way or another.
Scores:
EricBess: 15
TomB: 14
DarthFerret: 13
Oversoul: 13
sageridder: 13
train: 13
Ransac: 12
rokapoke: 12
Melkor: 11
Mooseman: 10
turgy22: 9
Limited: 7
Lythand: 6
mythosx: 6
cardboardbox: 0