Plenty of alien invasion movies have become box office hits and certified classics, but here are some forgotten alien invasion movies that still hold up today.

When 1986's Star Trek IV: The Voyage Home ended, it felt like the franchise had tied up just about everything. The humpback whales were safe in the 23rd century. Earth had been saved, Admiral James T.

Spielberg and ET looking at each other - Aaron Rapoport/Getty Images Steven Spielberg might be best known for "Jaws" and "Jurassic Park", but it's aliens where Spielberg seems to keep returning. Despite a huge roster of movies, "E.T". and "Close Encounters ...