The best science fiction and fantasy television hooks you with endless suspense... including hair-raising cliffhangers. But only the greatest cliffhangers can make you throw your remote at the screen, and keep you wondering for weeks. Here are the 20 awesomest.

It's hard to imagine what television would look like without The X-Files to borrow from. Tons and tons of television shows have lifted pieces of the classic show's format, about FBI agents and mysterious, sinister events. So it's kind of sad to see that Chris Carter is creating a new show that, at first blush, sounds…

One of the wonderful things about our television obsessions is, they keep us guessing. But sometimes, when someone asks a straight question and doesn't get a straight answer, it can get a bit annoying. Mysterious non-answers are a staple of television science fiction and fantasy — and sometimes it feels like people …

Television shows are like sports teams: Sometimes they just have an off season. (And sometimes they just dive down a terrible hole and get trapped forever.) When a science fiction or fantasy show has a terrible no-good year, it's especially noticeable, because the fantastical plot devices get dumber and the…

Aliens who come to Earth inevitably get hooked on our human vices. It's just a natural law of the cosmos. And sooner or later, every extraterrestrial wants to smoke. It's a filthy habit, but just barbaric enough to seem fascinating.

Remember when David Duchovny said way back when that a third X-Files movie was in the works? Now his co-star Gillian Anderson seems to be following suit.

Just because science fiction has a low budget, doesn't mean its alien creatures need to look silly or ho-hum. Here are 10 low-budget alien spectaculars that blew our minds.

With his recent appearance on Doctor Who, Mark Sheppard cemented his place as science fiction's greatest character actor. But we've been loving Sheppard for years...and we assembled this video of every last one of his scifi roles to prove his awesomeness.

Whether you're on the side of good or evil, you must respect a sick lair. If there's one thing that brings superheroes, supervillains, and intrepid government employees together, it's an appreciation for a secure, well-equipped base of operations.