This Week's TV: Is Leonard Nimoy really coming back to Fringe?

The promo for this week's Fringe hints that a special guest star could help the show live long and prosper... but is it true? Also, there's a four-hour miniseries in which Eddie Izzard and Donald Sutherland rock some crazy hair. A brand new TV show could bring us our weirdest future dystopia in ages. And Ben Edlund is writing and directing a new Supernatural!

Check out clips from the two-part Adventure Time special, plus Eureka, Lost Girl, Vampire Diaries, Secret Circle and more!

Top image: Fringe, via Grande-Caps.

Today:

Adventure Time (7:30 PM, Cartoon Network):
There's a special half-hour episode, made up of a two-part episode about the Nightosphere! Here's the skinny, plus two clips:

"They Went to the Nightosphere" - Finn and Jake wake up trapped in the Nightosphere with no memory of how they arrived. "Daddy's Little Monster" Finn and Jake return to the Nightosphere to save Marceline.

That's followed by a new Regular Show.

Eureka (9 PM, Syfy):
How will this show follow up last week's ultra-shocking events? Here's your first hint, plus a sneak peek clip:

When the Astraeus ship is finally found, the crew has vanished. ... Beverly Barlowe resurfaces in Eureka seeking Carter's help to free the Astraeus crew, and the rescue plan lands Carter in the crew's virtual world.

That's actually two episode synopses from two different listing sites, mashed together.

Motorcity (9 PM, Disney XD):
It's a new dystopian future cartoon, from the creator of Metalocalypse. Here's what to expect:

A turbo-charged animated series set in futuristic Detroit, controlled by an evil billionaire who bans personal freedoms, including automobiles. Now it's up to The Burners, a group of rebels led by 17-year-old Mike Chilton, to customize their fleet of cool hot rods and set out to stop Kane from taking over their last oasis of freedom, a subterranean refuge dubbed Motorcity.

Lost Girl (10 PM, Syfy):
It's "Scream a Little Dream." In which:

Bo deals with her relationship with Dyson; Bo probes an apartment building whose tenants seem to have lost their minds.

Check out a sneak peek!

Also on TV tonight: a brand new House at 9 PM on Fox, and a brand new Castle on ABC at 10 PM.


Tuesday:

Mysteries at the Museum (9 PM, Travel):
Basically nothing on TV tonight. So we thought we'd direct your attention to this special episode, which deals (in part) with the Boston Molasses Disaster of 1919. That's a scientific marvel, right there. Here's an unrelated video on the subject.

Also on TV tonight: A new Unforgettable on CBS at 10 PM, in which Carrie's greatest nemesis frames her for his own murder.


Wednesday:

There's just nothing. Sorry about that. We even looked at those weird little channels that almost nobody gets.


Thursday:

The Vampire Diaries (8 PM, The CW):
It's almost the season finale, which means shit is starting to get real. Here's what to expect:

A DAY WITHOUT A VAMPIRE - Klaus acts on his intentions to leave town with Elena (Nina Dobrev), but finds resistance from a surprising new enemy. Bonnie (Kat Graham) calls on Abby (guest star Persia White) to help her with a difficult spell. As events spiral out of control, Elena is determined to protect Caroline (Candice Accola), Damon (Ian Somerhalder) and Stefan (Paul Wesley) enlist Tyler's (Michael Trevino) help, while Bonnie and Jeremy (Steven R. McQueen) take a terrifying risk to make sure her spell is effective. Damon and Stefan have a surprisingly candid conversation about the future.

It's funny that the most thrilling part of that rigamarole is "Damon and Stefan have a candid conversation." Here's a clip, in which both Salvatore Brothers have a standoff with Klaus.

The Big Bang Theory (8 PM, CBS):
Worth mentioning because it's all about NASA moving up Howard's launch date, endangering his wedding plans. Meanwhile, Leonard says something weird in bed with Penny, and drama presumably ensues.

Person of Interest (9 PM, CBS):
This episode is called "Many Happy Returns," which leaves us hoping breathlessly that Jim Caviezel wakes up in a strange seaside town where he's given a number instead of a name, and weird balloons hunt him down. Except that, oops. That already happened — and it wasn't that great. Instead, this is about Mr. Reese getting a day off for his birthday, while the Machine spits out a number that's bound to stir up unpleasant memories for him.

The Secret Circle (9 PM, The CW):
You can tell this show is still in its first season, because unlike Vampire Diaries, they're still making an effort to have the kids do high-school stuff occasionally.

PROM NIGHT IN CHANCE HARBOR - It's Prom night in Chance Harbor and after Adam (Thomas Dekker) uncloaks a crystal hidden in the school, Blackwell (guest star Joe Lando) tells Cassie (Britt Robertson) she can use her dark magic to find it. When Cassie follows this advice, it leads her to a dangerous discovery. Meanwhile, Faye (Phoebe Tonkin) invites Jake (Chris Zylka) to Prom, despite the fact that he stood her up two years earlier. Adam, Diana (Shelley Hennig), Cassie and Melissa (Jessica Parker Kennedy) finally make it to Prom but when they lose the crystal to Eben, they end up in a life and death situation. Meanwhile, Dawn (Natasha Henstridge) attempts to stop Blackwell, who casts a deadly spell on Charles (Gale Harold).

Check out a couple of clips!

Touch (9 PM, FOX):
In "Zone of Exclusion," this show is actually going into space:

Following numbers from Jake, Martin helps reunite a French woman with her biological mother and twin sister, then he attempts to find the person responsible for their estrangement. In the meantime, a superstitious young Italian woman is fretting when her astronaut husband loses contact with earth.

Awake (10 PM, NBC):
This show is still pretty fascinating, especially with the revelation at the end of last week's episode. Looks like we're going to see some interesting follow-through on that this week...

Detective Britten (Jason Isaacs) and Bird (Steve Harris) look into what appears to be a case of gang violence, but clues from his other reality force him to look a little closer. Meanwhile, Hannah (Laura Allen) uses her intuition to talk through a tough situation with Rex's (Dylan Minnette) girlfriend Emma (Daniela Bobadilla). Later, Captain Harper (guest star Laura Innes) finds herself having to take back a promise and Detective Vega (Wilmer Valderrama) is planning Britten's going away party.

Also on TV tonight: There's a new Community at 8 PM on NBC, in which everybody deals with the shocking death that happened last week.


Friday:

Supernatural (9 PM, The CW):
This week's episode's description concludes with the nine most thrilling words in television.

CASTIEL AWAKENS FROM HIS COMATOSE STATE - Meg (guest star Rachel Miner) calls Dean (Jensen Ackles) and Sam (Jared Padalecki) and tells them Castiel (guest star Misha Collins) is awake and talking. Meanwhile, a teenager named Kevin (guest star Osric Chau) gets hit by a bolt of lightening and is turned into a reluctant prophet. Sam and Dean believe Kevin holds the key to defeating the Leviathans but must fight off two Archangels who want him for their own purposes. The episode was written and directed by Ben Edlund.

Spooooooooooooooon!

Fringe (9 PM, FOX):
David Robert Jones' final plan kicks into action, and judging from this clip, we may get a teeny bit more Nimoy action:

Walter reluctantly revisits his painful past after terrifying cases of spontaneous human combustion. Meanwhile, the future of both universes is at stake when the Fringe team faces David Robert Jones in the mother of all battles.

I'm guessing it'll be the voice of Nimoy in a recording, or the brain of Nimoy in a computerized shell, or some other way to have Nimoy without requiring him to be physically present. But we'll see!

Grimm (9 PM, NBC):
Now that we've anointed this as the best fairytale show on TV, they're doing Cinderella:

THE CLASSIC CINDERELLA TALE TAKES A VERY DARK TURN — Nick (David Giuntoli) and Hank (Russell Hornsby) are called to investigate the mysterious death of a wealthy matriarch, after her stepdaughter loses everything in a Ponzi scheme. Meanwhile, Juliette (Bitsie Tulloch) does some digging into the mysterious death of Nick's parents in an effort to help him find closure.

Here's a clip, introduced by Pilates Wolf.

Also on TV tonight: There's a new Nikita on The CW at 8 PM, two new Phineas & Ferb episodes at 8:30 PM on Disney, and a new Ancient Aliens ("Aliens and Dinosaurs!") at 10 PM on H2.


Saturday:

Cartoons (9:30 AM, Cartoon Network):
More awesomeness with Thundercats ("Curse of Ratilla"), Green Lantern: The Animated Series ("Regime Change") and Young Justice ("Earthlings.") Plus the usual awesome batch of silly/artsy DC Nation cartoon shorts.

Treasure Island (7 PM, Syfy):
Syfy has a new four-hour miniseries, with some high-powered stars. But instead of airing it across two nights, as you'd sort of expect, they're showing the whole shebang this Saturday, in one big glop. Syfy says this is

a fresh, new spin on the classic tale, Treasure Island, featuring an all-star cast led by Eddie Izzard, Elijah Wood and Donald Sutherland. Robert Louis Stevenson's swashbuckling adventure story about fantastical treasure, youthful courage and murderous greed will premiere Saturday, May 5 from 7-11PM (ET/PT) on Syfy. Izzard (The Riches, Ocean's 12) stars as Long John Silver, Wood (Lord of the Rings, The Hobbit) plays Ben Gunn and Sutherland (Pride and Prejudice, Ordinary People) portrays Flint.

Looks like it already aired in the U.K.

Also on TV today: A new Transformers Prime on The Hub at 8:30 PM.


Sunday:

Ultimate Spider-Man (11 AM, Disney XD):
Just in time for The Avengers, the Hulk is guest-starring on this show!

Spider-Man finally agrees to a video interview with Mary Jane and she gets the exclusive scoop when she records Spidey and Hulk in an all-out battle across Manhattan.

And then Avengers: Earth's Mightiest Heroes features the Guardians of the Galaxy.

Once Upon a Time (8 PM, ABC):
It's "An Apple Red as Blood," as Emma continues to consider bailing on the little town that couldn't.

Henry pleads with Emma to stay in Storybrooke and continue her quest as the savior of the fairytale dwellers, and Regina concocts a plan that could rid her of Emma forever. Meanwhile, back in the fairytale land that was, Snow White enlists the aid of her fellow fairytale cohorts to attack the Evil Queen and save Prince Charming's life.

You have to love the way Regina says, "Taste my forbidden fruit."

Game of Thrones (9 PM, HBO):
The comparison between these two magical shows on Sunday nights really does Once Upon a Time no favors. Here's what happens in "The Old Gods and the New":

Arya gets a surprise visitor; Daenerys takes a stand for what she believes is rightfully hers; Joffrey meets his subjects; Jon must prove his mettle to Qhorin.

Also on TV tonight: Fox has its usual animated comedies, including The Simpsons and Family Guy. There's a brand new Mythbusters on Discovery at 9 PM. And BBC America has a new special, Planet Earth: Extreme Survival, at 10 PM. And there's a new Metalocalpyse on Adult Swim, just after midnight.

Sources: Futon Critic, MSN TV, TV Guide, and various TV studio press releases.