There are many excellent but underrated sci-fi shows currently available to stream for your binge-watching pleasure.

Find out which sci-fi shows are the best for rewatches based on their compelling narratives and character development, from Doctor Who to Dark.

If you've watched all the science fiction series on the streaming services you subscribe to, here are some great sci-fi shows you can watch for free elsewhere.

Great sci-fi shows contain rich themes that challenge audiences, like in heavy episodes of Doctor Who, The X-Files, Westworld, and Black Mirror.

Lost's time-travel masterpiece is still considered the best single episode of sci-fi TV ever, nearly two decades later.