See every trailer for all the new fall sci-fi shows right here

Vampires and witches, time travelers and alien invaders, superheroes and a Stargate—they're waiting just around the corner as a new TV season begins.

Check out the teaser trailers for all the new shows and returning favorites after the jump.

Dollhouse, Fox
Echo's back, and in this second season she may just find out who she really is.
Premieres Friday, Sept. 25, at 9 p.m.

Eastwick, ABC
Three women discover they have magical powers when a devilish presence named Darryl Van Horne comes to town.
Premieres Wednesday, Sept. 23, at 10 p.m.

FlashForward, ABC
Everyone on the planet blacks out for 2 minutes 17 seconds. When they come to, they remember a vision of what they'll be doing six months in the future. Chaos ensues.
Premieres Thursday, Sept. 24, at 8 p.m.

Fringe, Fox
In season two, there's a good chance Olivia and Peter will get to explore that alternate universe with the help of Leonard Nimoy.
Premieres Thursday, Sept. 17, at 9 p.m.

Ghost Whisperer, CBS
Melinda and Jim will have their hands full when the series jumps forward in time and their little boy begins to out-ghost-whisper Melinda in the fifth season.
Premieres Friday, Sept. 25, at 8 p.m.

Heroes, NBC
It's season four, but is Nathan Sylar or is Sylar Nathan?
Premieres Monday, Sept. 21, at 8 p.m.

Legend of the Seeker, Syndication
Thank God Richard killed big bad Darken Rahl at the end of the first season. Now the real fun can begin as the Wizard's second rule rears its ugly head.
Premieres Saturday, Nov. 7, at various times

Medium, CBS
Allison may be recovering from the results of her brain tumor, but in the show's sixth season the real recovery comes with Medium moving to CBS.
Premieres Friday, Sept. 25, at 9 p.m.

Sanctuary, Syfy
With Ashley under the control of the Cabal, Magnus has her work cut out for her if she's going to rescue her daughter when season two begins.
Premieres Friday, Oct. 9, at 10 p.m.

Smallville, The CW
In its ninth season (yes, nine seasons!), it looks like Zod is back and Clark may just finally have to accept his destiny.
Premieres Friday, Sept. 25, at 8 p.m.

Star Wars: The Clone Wars—Rise of the Bounty Hunters, Cartoon Network
The Jedis face a "new breed of villain" in the popular animated show's second season, along with new characters, locations and creatures and a forbidden Jedi relationship.
Premieres Friday, Oct. 2, at 8 p.m.

SGU: Stargate Universe, Syfy
Forget tidy Stargate stories. This new Stargate takes place on a dilapidated Ancient ship with a mission that won't allow the unexpected crew to get home.
Premieres Friday, Oct. 2, at 9 p.m.

Supernatural, The CW
Sam and Dean have dealt with both heaven and hell. Now, as the fifth season begins, the brothers will have to deal with Lucifer and Armageddon. Lucky boys!
Premieres Thursday, Sept. 10, at 9 p.m.

Remember about 25 years ago there were these alien Visitors who looked like us but were actually reptiles who liked to munch on rodents when they weren't trying to take over Earth? Well, they're back in a new reinvented series from Scott Peters.
Premieres Tuesday, Nov. 3, at 8 p.m.

The Vampire Dairies, The CW
Two vampire brothers ... one good, one evil ... battle for the heart and soul of a girl named Elena while she tries to deal with high school.
Premieres Thursday, Sept. 10, at 8 p.m.

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