Aliens are often the cornerstone of many great sci-fi shows. Here are 15 of the best shows that heavily revolve around extraterrestrial beings.

Brad LaCour is a Senior List Writer for Collider. Based out of Los Angeles, California, Brad lives close enough to the stars but is too busy to find out where exactly they live. Brad is fairly certain ...

From the Star Wars spin-off The Mandalorian to the classic series Star Trek: The Next Generation, these are the best sci-fi ...