Underworld Pentalogy (2003-17) (...and counting)
Currently there are five Underworld movies (but there will be a sixth and possibly a seventh - hooray?).
Underworld,
Evolution,
Rise of The Lycans,
Awakening, and
Blood Wars. First movie is probably best movie, although the second movie tells a better(ish) story. We shall pretend the third movie does not exist. The third movie, a cheating, thieving, conniving prequel of a movie, is marked by the nearly complete absence of Selene, is set in the distant past, and is therefore definitely the worst. But then there's the fourth movie.
Awakening boldly drove the ailing franchise down a scifi path, setting the story several years into a future where everyone now knows there are vampires and werewolves and a great purge of their kind has taken place. At the same time, Awakening ups the kungfu gore to 11. That's a pretty great direction for this kind of franchise. Naturally, in the fifth movie, this year's
Blood Wars, they just forget all about that and pull the same old gothic vampire crap again. All the Underworld movies so often have the opportunity to do great stuff with their characters and storylines and then... they don't. However...
Underworld:
Evolution:
Rise of The Lycans:
Awakening:
Blood Wars: