From tales of Earth invasion to exploration of deep space, time-travel and beyond... science-fiction television has been entertaining the masses (and not just us geeks!) for decades.

But when it comes to sci-fi, which show soars higher than all the rest?

Digital Spy has assembled an epic shortlist of 55 shows below (to narrow it down, we've included only live-action series and excluded anything inspired by a comic book).

Vote now in our poll to determine the winner. There can be only one!

This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io