This Week's TV: The Return of Supernatural, Clone Wars, Vampire Diaries and Tons of Other Shows!

Most of your favorite TV shows are back this week, as the spring TV season cranks into action. Check out your first look at new episodes of Star Wars: The Clone Wars, Supernatural, Vampire Diaries, Once Upon a Time and several others. Plus our favorite nerdy musical icon is finally getting his own Behind The Music special! (No, not MC Frontalot.)

Find out everything you've got to look forward to in this week's television, right here!

Today:

The CW is having a marathon of Secret Circle episodes all evening for the next few days, to get you ready for the show's triumphant return on Thursday.

Other than that, there's absolutely nothing on tonight. That'll teach you to appreciate Terra Nova more.

Tuesday:

At 10 PM, CBS has the midseason premiere of of Unforgettable, that show about the cop who can freeze-frame and enhance and zoom in on anything she's ever seen in her life. In "The Butterfly Effect,"

When a construction worker with a promising future is murdered, Carrie and Al wonder if his ties to the mob were the cause of his death or an unrelated coincidence.

Wednesday:

At 9 PM in most markets, PBS has the season premiere of Nova, with "Deadliest Volcanoes." Here's the deets:

Millions of people around the world live in the shadow of active volcanoes. Under constant threat of massive volcanic eruptions, their homes and their lives are daily at risk from these sleeping giants. From Japan's Mount Fuji to the "Sleeping Giant" submerged beneath Naples to the Yellowstone "supervolcano" in the United States, we will travel with scientists from around the world who are at work on these sites, attempting to discover how likely these volcanoes are to erupt, when it might happen, and exactly how deadly they could prove to be.

And then at 10 PM, the History Channel has the season finale of Brad Meltzer's Decoded, in which he wonders whether Houdini was murdered.

Thursday:

There's the midseason premiere of The Vampire Diaries on The CW at 8 PM, in which we see just how well Stefan's cunning plan works out. (And yes, I'm suddenly wanting to start referring to Stefan as Baldric.) Here's the blurb:

A REASON TO FEEL GUILTY - Stefan (Paul Wesley) has hidden the coffins containing the bodies of Klaus' (Joseph Morgan) family, and Klaus quickly turns to violence to convince Damon (Ian Somerhalder) and Elena (Nina Dobrev) that no one will be safe until he finds Stefan and gets his family back. Tyler (Michael Trevino) continues to make the most of his new abilities as a hybrid, but he has to face the disturbing consequences of his actions as well. After a terrifying incident, Elena and Alaric (Matt Davis) grow increasingly concerned about Jeremy's (Steven R. McQueen) attitude and, ultimately, his safety. Alaric meets the beautiful Dr. Fell (guest star Torrey Devitto, "Pretty Little Liars"), who is intrigued with his amazing ability to heal. While trying to strike a deal with Klaus, Elena delivers news that truly shocks him.

Also at 9 PM: The CW has the midseason premiere of The Secret Circle, "Darkness":

CASSIE REVEALS HER DEEPEST SECRET YET; STEFANIE KRAMER ("HUNTER") AND GREY DAMON ("FRIDAY NIGHT LIGHTS") GUEST STAR - Cassie (Britt Robertson) turns to Adam (Thomas Dekker) when she uncovers a secret about herself that she needs kept from the rest of the Circle, including Diana (Shelley Hennig). Meanwhile, Diana is thrilled when her grandmother Kate (guest star Stefanie Kramer, "Hunter") drops in for a visit, but Charles (Gale Harold) is suspicious of his mother's motives after Kate takes an unusual interest in Cassie. Meanwhile, Faye (Phoebe Tonkin) recruits a mysterious stranger named Lee (guest star Grey Damon, "Friday Night Lights") to help her with a spell that could change the balance of the Circle forever.

And here's a sneak peek.

Friday:

Randomly, Cartoon Network is showing a new Secret Mountain Fort Awesome at 4:30 PM.

At 8 PM, there's another episode of Chuck, on NBC, "Chuck Vs. The Kept Man":

GERTRUDE VERBANSKI RETURNS WITH A MISSION FOR CHUCK AND A PROPOSITION FOR CASEY — CARRIE-ANNE MOSS GUEST STARS — While Chuck (Zachary Levi) and Sarah (Yvonne Strahovski) contemplate the next step for Carmichael Industries, Casey's (Adam Baldwin) forbidden love, Gertrude Verbanski (guest star Carrie-Anne Moss, "The Matrix"), walks back into his life with a questionable mission in South Beach. Meanwhile, Jeff's (Scott Krinsky) enhanced intelligence leads he and Lester (Vik Sahay) to suspect that something unusual may be happening at the Buy More.

Also at 8, The CW has the return of its frequently sciencey spy show Nikita, with "Pale Fire":

ALEX RETURNS TO HER CHILDHOOD HOME TO KILL SEMAK - Alex's (Lyndsy Fonseca) mission to take down Gogol comes to a head as she infiltrates her childhood home and faces ghosts from her past. On a completely separate mission, Nikita (Maggie Q) also ends up at the mansion to steal Semak's (guest star Peter J. Lucas) black box. Nikita and Alex run into each other and decide to join forces, but they run into a major roadblock. Meanwhile, Michael (Shane West) and Owen (guest star Devon Sawa) work together to figure out Percy's (Xander Berkeley) secret plan with the Guardians.

A third option at 8 PM: the midseason premiere of CBS' A Gifted Man, the show about the surgeon who talks to his altruistic wife's ghost. Here's what to expect from "In Case of a Bolt from the Blue":

WHEN MICHAEL SHOWS SIGNS OF A SERIOUS CONDITION, HIS COLLEAGUES AT THE CLINIC MUST OPERATE ON HIM IMMEDIATELY DURING A BLIZZARD. While tending to patients at the clinic during a blizzard, Michael shows signs of a severe condition that requires immediate surgery

But that's not all! Also at 8 PM, there's the midseason premiere of Star Wars: The Clone Wars on the Cartoon Network! And it's going to keep getting darker. Here's what's up with "Escape From Kadavo":

Anakin tries to convince the Zygerrian Queen that she too is a slave and pawn in an evil Separatist plot. Meanwhile, Obi-Wan toils in the slave camps of Kadavo, a grim situation that grows increasingly bleak.

Check out a preview right here.

But there's even more! A fifth option at 8 PM is the one-hour series finale of Wizards of Waverly Place on Disney.

"Who Will Be The Family Wizard" - Justin, Alex and Max face a sudden and ultimate test to determine which one of them will be entitled to keep their wizardly powers. After 106 episodes of the Emmy Award-winning hit comedy, the answer will finally be revealed on a special one-hour episode.

And then at 8:30 PM Cartoon Network has a new Generator Rex, "Guy Vs. Guy."

Then at 9 PM, there's the midseason premiere of Supernatural, on The CW, "Adventures in Babysitting":

"ONCE UPON A TIME" ACTRESS MEGHAN ORY GUEST STARS - Still reeling after what happened to Bobby (Jim Beaver), Dean (Jensen Ackles) becomes dangerously obsessed over finding a way to take down Dick Roman (guest star James Patrick Stuart). Meanwhile, Sam (Jared Padalecki) decides to help a teenage girl (guest star Madison Mclaughlin) look for her father (guest star Ian Tracey), a hunter who has gone missing. Sam traces his last steps to a truck stop where the help (guest star Meghan Ory) turns out not to be so friendly.

At 10 PM, Syfy has the fourth season premiere of Merlin, "The Darkest Hour Part 1."

Merlin is to face his toughest challenge yet when Morgana's blind determination puts at risk Arthur's future as well as the very balance of the world. With her unbounded powers at their highest, the sorceress uses powerful magic to tear the mystical veil between worlds making the mighty Cailleach to come forth.

Then at 11 PM, there's the season finale of X-Men Anime on G4, "Destiny."

Saturday:

At 5 PM, The Hub has two episodes of R.L. Stine's The Haunting Hour: The Series, back to back.

At 9 PM, VH1 has a new Behind The Music, focusing on "Weird" Al Yankovic — an O.G. nerd musician who's known for his copious science fiction in-jokes. Plus the uncategorizeable movie UHF.

Sunday:

Fox brings back its Sunday night animation bloc, starting at 8 PM with a new Simpsons, followed by Cleveland Show, Family Guy and American Dad.

Also at 8 PM: the midseason premiere of Once Upon a Time, with "Desperate Souls," written by Jane Espenson.

REGINA AND MR. GOLD TAKE OPPOSITE SIDES WHEN EMMA RUNS FOR PUBLIC OFFICE, AND RUMPLESTILTSKIN TRIES TO TRACK DOWN A POWERFUL SOURCE TO KEEP HIS SON FROM FIGHTING IN A MEANINGLESS WAR... Regina and Mr. Gold play dirty politics and take opposite sides when Emma runs for a coveted Storybrooke public office against Sidney. Meanwhile, back in the fairytale world that was, Rumplestiltskin tries to track down the ultimate power source in order to help his son avert the horrors of a meaningless war.

And here are four sneak peeks:

At 9 PM on TNT, there's a new Leverage, "The Radio Job."

At 10 PM, there's a brand new Finding Bigfoot on Animal Planet.

And finally, at 11:30 PM on Cartoon Network's Adult Swim, there's another new Robot Chicken, "Casablankman II."