TV THIS WEEK: Sanctuary Mondays, Fringe's Sam Weiss and more!

Syfy shuffles its schedule this week as Sanctuary moves to Mondays. Elsewhere, Fringe rocks our world as we finally find out who Sam Weiss really is, and Zod returns to Smallville as the series nears its big finale.

And this week, Sean tries to stop Sophia's weapon from reaching the U.S. on The Event, the Destiny crew explore the abandoned planet of their descendants on Stargate Universe, it's the season finale of Fact or Faked: Paranormal Files, Sheldon goes dancing on The Big Bang Theory, Stefan and Elena try to get some romance in on The Vampire Diaries, Sam and Dean have mommy issues on Supernatural, Arthur creates a tribunal of justice on Camelot, the FBI nabs the Doctor on Doctor Who, and Ned arrives at King's Landing on Game of Thrones. This week there's no new Chuck.

Here's what we have to look forward to this week on sci-fi, fantasy, paranormal and spy-fi TV.

Monday, April 25

The Event (NBC) 9 p.m. - "Strain"

The vice president and Sophia's plan against the president takes effect, while Sean and Vicky attempt to stop Sophia's weapon from reaching the U.S. Elsewhere, Michael helps Leila.

Here's a promo:

Stargate Universe (Syfy) 9 p.m. - "Epilogue"

The crew of the Destiny explore the abandoned city built by their descendants, while Col. Young and Rush try to figure out what to do with their passengers since their home planet has become uninhabitable.

Here's a preview:

Sanctuary (Syfy) 10 p.m. - "One Night"

Moves to a new night! Star Amanda Tapping directs this episode, which explores what happens when Will and Abby head to dinner but are abducted at gunpoint. The Sanctuary team begins to mobilize to save them, but Magnus puts a stop to the rescue when she discovers who's behind the kidnapping, leaving Will and Abby on their own. Sanctuary swaps timeslots with Urban Legends, which moves to Fridays at 10 p.m.

Here's a preview of upcoming episodes:

Other Monday shows of interest:

On A&E's Paranormal State (10 & 10:30 p.m.), the team heads to the Pennsylvania's Poconos to dig into a case of a vengeful spirit in "Vendetta." And then they're off to Alabama to investigate the Sweetwater Mansion in "Southern Discomfort at Sweetwater Mansion."

Wednesday, April 27

Fact or Faked: Paranormal Files (Syfy) 10 p.m. - "Whaley Ghost House/Muck Monster"

Season finale! The team explore photos of what appears to be a ghost at San Diego's Whaley House, and then they go to Florida to investigate a family video that may have caught a creature in the Loxahatchee River.

Here's a preview and a monster building sneak peek:

Thursday, April 28

The Big Bang Theory (CBS) 8 p.m. - "The Agreement Dissection"

Priya tears apart Sheldon's roommate agreement with Leonard, and it's going to be a smokin' hot night when the women take Sheldon dancing.

Here's a look:

The Vampire Diaries (The CW) 8 p.m. - "The Last Day"

Believing it might just be their last day together, Stefan and Elena decide to spend a romantic day. Of course, looming in the background is the fact that Klaus plans to use Elena as a sacrifice to break the moonstone curse. Do you think there's any chance Damon will behave himself? I think not. Elsewhere, Tyler returns to Mystic Falls just in time for the full moon.

Here's an extended promo:

Nikita (The CW) 9 p.m. - "Glass Houses"

A woman charged with keeping a black box ends up in danger when Michael learns her priorities have shifted. Meanwhile, Nathan gets caught up in an argument between Jaden and Alex.

Here's a preview:

Friday, April 29

Smallville (The CW) 8 p.m. - "Dominion"

With only three more episodes to go, including this one, the Green Arrow's back and doing double (or is it triple?) duty as Justin Hartley (aka the Green Arrow, aka Oliver Queen) steps into the director's chair. In the episode, when Clark learns that a Phantom Zone prisoner has figured out a way to escape, he heads to the Zone. But Oliver tricks him into taking him along, and once there they discover that Zod has taken control once again. Elsewhere, Lois discovers that Clark's trusted Tess with a secret he hasn't told her about. Callum Blue guest-stars as Zod.

Here's a preview:

Supernatural (The CW) 9 p.m. - "Mommy Dearest"

Sam and Dean head to a small Oregon town and discover the townfolk are all demons, but they seem to be dying. Meanwhile, Eve messes with the brothers' heads by bringing back their mother as a demon to torment them. But what I really want to know is: What the heck is going on in Heaven, and what's got Castiel's allies turning on him?

Here's a look:

Fringe (Fox) 9 p.m. - "The Last Sam Weiss"

The better this show gets, it seems, the less people watch. What's that about? With the machine on and wreaking havoc on our universe, Olivia and Sam Weiss (Kevin Corrigan) try to figure out what steps to take to save the world.

Here's a promo and a Sam-and-Olivia sneak peek:

Camelot (Starz) 10 p.m. - "Justice"

When Arthur creates a tribunal of justice to resolve disputes, he attempts to use wits, not blood. Elsewhere, Morgan gets some help from Sybil in an attempt to claim Arthur's throne.

Here's a look:

Other Friday shows of interest:

The Cartoon Network offers up new episodes of Batman: The Brave and the Bold (6:30 p.m.), Ben 10: Ultimate Alien (7:30 p.m.) and Generator Rex (8 p.m.). And on the Travel Channel's Ghost Adventures (9 p.m.), it's a trip to Nickajack Lake, Tenn., on the hunt for ghosts at the "Hales Bar Marina & Dam."

Saturday, April 30

Doctor Who (BBC America) 9 p.m. - "Day of the Moon"

Part two of the two-part premiere! Last week began with ... SPOILERS! Oh, go watch it if you want to know the shocking start of last week's episode. In the conclusion to the exciting premiere, the FBI locks up the Doctor and tries to hunt down Amy, Rory and River Song.

Following the episode, you can check out Doctor Who in America (10 p.m.), for some behind-the-scenes goodies about the making of the premiere.

Here's a look:

Sunday, May 1

Game of Thrones (HBO) 9 p.m. - "Lord Snow"

Ned finally makes it to King's Landing only to discover that the crown's coffers are empty. Elsewhere, Jon Snow has trouble at Castle Black.

Here's a look:

What are you going to watch?

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