That's right, Supernatural is celebrating its 200th episode with a musical, and teenage girls are playing the roles of Sam and Dean. Atlantis returns for another season of mashed-up Greek mythology; Gravity Falls heads to time jail; and Z Nation has to deal with glowing, radioactive zombies. Get all the details below!

Tonight

Gotham (8 PM, Fox)

How does Gotham's premiere financial firm screen job candidates? With a fight club, of course. Plus, young Bruce returns to school this week. Do you want to go to learn with Batman?

The Originals (8 PM, The CW)

Klaus finds himself negotiating with Mama Esther for Elijah's freedom, but Esther has a few dark secrets from Klaus' past up her sleeve. Somehow, I doubt that a visitor from said past will make things any simpler.

Gravity Falls (8:30 PM, Disney XD)

TIME JAIL: "Blendin Blandin returns to face off with Dipper and Mabel in a futuristic battle that could trap them forever in time jail."

Scorpion (9 PM, CBS)

The Scorpion team gets another dose of dubious computer science when they team up with a musician who developed an algorithm that creates hit songs. It's to solve the murder of a music blogger. Naturally.

Sleepy Hollow (9 PM, Fox)

Henry sends a succubus out into the world to drain life from its victims…sexily.

Star Wars Rebels (9 PM, Disney XD)

Finally, an episode about the ladies! Hera and Sabine go on a supply run and find themselves stranded in an abandoned locale. Well, it seems abandoned at first.

Tuesday

The Flash (8 PM, The CW)

When the army takes over the investigation of a downtown bombing, Joe asks Barry and the S.T.A.R. team to look into things. That's when they learn about the metahuman Bette Sans Souci, better known as the explosive Plastique.

Marvel's Agents of S.H.I.E.L.D. (9 PM, ABC)

The team discovers murder victims bearing the same alien glyphs that Coulson has been sketching. So what Coulson secrets will we learn now?

Supernatural (9 PM, The CW)

Supernatural celebrates its 200th episode with a musical. When the Winchesters investigate a teacher's disappearance, they discover that the school is putting on a musical based on their lives. Expect lots of familiar faces.

Forever (10 PM, ABC)

Because we haven't had enough questionable portrayals of BDSM on television, this week's murder mystery involves a successful businessman who submitted to ritual pain and had a "dominion therapist." And in this week's flashback, we see what happened when Henry shared his secret with his first wife.

Person of Interest (10 PM, CBS)

In order to keep tabs on the latest Person of Interest, Shaw joins up with a team of international thieves. But her felonious undercover position puts her at risk of being detected by Samaritan.

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Also on tonight: Syfy's Town of the Living Dead ends its season with two episodes airing at midnight and 12:30 AM.

Wednesday

Arrow (8 PM, The CW)

When Ted Grant stands accused of murder, Oliver and Laurel argue over his guilt or innocence. And in a flashback, we see what happens when Maseo tasks Tatsu with, uh, jogging Oliver's memory about where a China White informant stashed an important key.

The 100 (9 PM, The CW)

So Clarke's terrible decisions about whom to trust have landed her in hot water, but she's not going down without a fight. Meanwhile, the 100's rescue team works to solve a stranger and tensions mount when Raven and Wick are forced to work together.

American Horror Story (10 PM, FX)

As per usual, it's lust and murder at the freak show: "Elsa unveils a dangerous new act. Stanley puts pressure on Maggie to murder Jimmy. Paul indulges in a secret romance."

The Almighty Johnsons (11 PM, Syfy)

A party among the Norse gods gets complicated, "Ty's downward spiral picks up pace, while it is Gaia who spirals out of control."

Thursday

Cartoons (6 PM, Cartoon Network)

On Teen Titans Go! (6 PM), Raven shrinks the Titans so they can go inside Cyborg's body and fight his cold virus. On Clarence (6:30 PM), "Clarence, Sumo, and Jeff reminisce about the day they first met - although a few of the details are foggy." Steven spends this week's Steven Universe (6:45 PM) imagining what Garnet does with her day. Things get apocalyptic on The Amazing World of Gumball (7 PM) when a fed-up Larry quits all his jobs. And Rigby wants to set up Eileen's first flat-scren TV on Regular Show (7:30 PM).

The Vampire Diaries (8 PM, The CW)

Things aren't looking so hot for for Tripp and his vampire-killing operation when Stefan, Matt, and Enzo are all determined to get as much information out of him as possible. Plus, even though Elena doesn't remember their relationship, Damon is already messing with her new boyfriend.

The Almighty Johnsons (11:10 PM, Syfy)

"Ty must decide whether to call the police on Agnetha, or help her cover up Eva's murder."

Friday

Legend of Korra (Streaming, Nick.com)

Korra is back at Air Temple Island with Tenzin, but who else will be reunited in the episode titled "Reunion"?

Haven (7 PM, Syfy)

Dr. Cross could expose Haven's secrets to the outside world—but what does she really want?

Grimm (9 PM, NBC)

Nick and Hank investigate a death that appears to have been caused by clay-induced asphyxiation, while Monroe and Rosalee deal with the cultural backlash of their inter-Wessen marriage.

Constantine (10 PM, NBC)

After a friend of John's accidentally unleashes a demon upon Atlanta, John may have to make a personal sacrifice in his battle with the underworld.

Z Nation (10 PM, Syfy)

Because the zombie tornado wasn't weird enough, this week we've got GLOWING RADIOACTIVE ZOMBIES.

Saturday

Sailor Moon Crystal (Streaming, Hulu, Crunchyroll, Neon Alley)

The Senshi travel to the moon, where they discover the ruins of the Silver Millennium.

Atlantis (9 PM, BBC America)

Season Two opens up a year after Season One ended. Now Ariadne is queen and she's engaged in a brutal battle with Pasiphae. Desperate, Ariadne turns to Jason for help.

Sunday

Once Upon a Time (8 PM, ABC)

This two-hour episode takes us back to Arendelle,where we see the great lengths the Snow Queen goes to to pit Elsa against Anna. In Storybrooke, Emma's powers are still out of control, but when Mr. Gold offers her a way to get rid of them forever, Hook tries to stop her. And Regina's quest to find the author of the storybook takes an unexpected turn.

The Walking Dead (9 PM, AMC)

We'll find out what happened on Carol and Daryl's side trip. Now whose body is that they're burning?