Messing With the Past on 'Eureka' (VIDEO)

'Eureka' (Fri., 9PM ET on Syfy) is a science fiction show set in the Northwest Pacific town of, well, Eureka. According to the premise of the show, ever since World War II, the U.S. government has been moving the world's geniuses to this town. Sheriff Jack Carter (Colin Ferguson) is a "normal" outsider in this town of brainaics.

[Spoiler alert.]

But if that premise wasn't already quirky enough for you, the creators of 'Eureka' have once again thrown time travel into the mix. Jack, Allison (Salli Richardson-Whitfield), and their other friends are hurled back into the year 1947, where they learn some surprising secrets about the founding of their town.

Of course, as all time-travelers know, you can't mess around with the past ... otherwise you might end up altering the present. "Our presence here could change the course of future events -- we have to keep a low profile." Allison says to Jack.

" ... Okay," Jack replies. Then, things around them explode in a series of fireballs. Hmm. Doesn't exactly seem like everyone is keeping a low profile.