From “Little Joe” Cartwright on Bonanza to the creative force behind Little House on the Prairie and Highway to Heaven, Michael Landon became one of TV’s most influential actor-producers.

The 1960s gave us legendary classics like Psycho, The Graduate, 2001: A Space Odyssey, and Bonnie and Clyde. But for every movie that became so deeply ingrained in our collective movie memories, there were dozens that...didn’t.

Even the greatest directors alive have made at least one film that didn’t land. Sometimes it’s a misunderstood swing for the fences, sometimes it’s a bizarre miscalculation, and sometimes it’s a spectacular box-office implosion that haunts studio executives to this day. Either way, as legendary as these directors are, there's still one time they absolutely did not stick the landing.

The 2000s delivered the kind of movies that became permanent fixtures in living rooms everywhere. People quoted them endlessly, watched them on repeat, and filled entire DVD collections with them. Looking back at the decade feels a lot like flipping through a stack of old favorites, and these films are a big reason why.

Some movies are festive. Some are definitely not. And then there’s that wild middle category—the films people fight about every December. Are they Christmas movies? Are they just movies that happen to take place at Christmas? Let’s settle nothing and argue everything.

Hollywood is full of “what ifs,”—and there are a bunch of pretty amazing "what ifs" when it comes to some of the most beloved film finales. Some of which almost turned out completely different.