The 10 best bad sci fi movies are the worst of the worst when it comes to the strange and fantastic worlds and technology. These bad sci fi films begs the question of how something so terrible even made it to theaters. Of course, nothing beats watching these bad sci fi movies play out on "Mystery Science Theater 3000", so there are the benefits of unintentional comedy. Here are the ten best bad sci fi movies:

  1. "Plan 9 from Outer Space" (1958). The classic trash sci fi film was so bad, it labeled Ed Woods the worst director of all time. Aliens cook up a half-baked scheme to resurrect the dead in order to prevent humans from developing Solaranite. 

  2. "Santa Claus Conquers the Martians" (1964). The movie title does not lie and this bad sci fi movie was actually made. Martians kidnap Santa Claus because there is no one on Mars to deliver gifts to their children.

  3. "Star Trek V: The Final Frontier" (1989). William Shatner takes the reigns as director and writer with disastrous results in one of the franchise's lamer sequels. Spock's half brother hijacks the Enterprise in order to search for the existence of God.

  4. "Robot Monster" (1953). A man in a gorilla suit and deep sea helmet ventures to Earth as part of an impending invasion. The bad sci fi movie doesn't get any better as the "monster" begins to get to know his human hostages.

  5. "Battlefield Earth" (2000). A travesty of a sci fi movie based on the novel by L. Ron Hubbard about a human uprising against aliens who conquered Earth. John Travolta hams it up royally and his fellow cast and crew fare no better in a car wreck of a film production.

  6. "Lost in Space" (1998). The Robinson family journeys out into space, but an accident sends them off course into the nether regions of space. This bad modernization of the old sci fi TV show bombed in the box office. 

  7. "The Fifth Element" (1997). Luc Besson wrote and directed this over saturated sci fi car wreck of epic proportions. Milla Jovovich is the alleged Fifth Element needed to combat a foe named, of all things, Evil as she is helped by a taxi driver who conveniently happens to be an ex-soldier. 

  8. "Indiana Jones & The Kingdom of the Crystal Skull" (2008). Steven Spielberg, George Lucas and Harrison Ford got the band back together and proved sometimes one goes to the well one too many times. The special effects were great and that was about it as the story revolves not around a sacred religious relic but space aliens in South America.

  9. "Aeon Flux" (2005). Based off the animated series, Charlize Theron brought the sci fi heroine who fights with rebels to overthrow the government to life. Sadly, that's about as much life as the bland and boring movie had before turning into a boring mess of an action movie.

  10. "Star Wars Prequel Trilogy" (1999 - 2005). This sci fi trilogy displays George Lucas' megalomania so much that it was hard to single out just one of the prequels. The flat acting, clueless direction and writing created a recipe for sci fi awfulness on an epic scale.