TV This Week: Can Nathan Fillion rescue a Troy-less Community?

This week, we bid farewell to American Horror Story: Coven; will this tale of New Orleans witches end on a high note, or will the magic fizzle out? Community goes on without Donald Glover, but Nathan Fillion is here to fill the hole in our hearts. Plus, catch clips and details from this week's episodes of Helix, Adventure Time, Arrow, and more!

Photo from NBC.com.

Monday

Adventure Time (7 PM, Cartoon Network)

Finn wants to be trained in swordfighting by an old gumball robot who lives in a junkyard. The robot's name: Rattleballs. And people say it's a kid's show.

Bitten (8 PM, Syfy)

The werewolf soap moves to a new timeslot with the episode "Trespass," in which Elena and Clay manage to track down the killer werewolf—but a deadly bloodbath follows.

Steven Universe (8 PM, Cartoon Network)

This week, Steven befriends a magical lion.

Beauty and the Beast (9 PM, The CW)

Is Vincent willing to reveal his beastly identity to save Cat's life?

A group of criminals looking to steal a rare necklace in Tori's (guest star Amber Skye Noyes) possession takes Cat (Kristin Kreuk), Tori and Tess (Nina Lisandrello) hostage at the precinct, leaving Vincent (Jay Ryan) as their only hope for help. Vincent is forced to make a decision since helping could reveal his true identity to the entire force.

Being Human (9 PM, Syfy)

Going from reverse werewolf to regular werewolf turns out to be complicated as Josh has trouble returning to his old life. Meanwhile, Sally finds herself thrown back in time to a time and place where something horrific seems to have happened to a mysterious little girl. And Boston has a new vampire boss — someone from Aidan's past.

Archer (10 PM, FX)

Archer's "Vice" season puts the ex-ISIS team in the path of the yakuza after Pam makes a deal that puts everyone in danger. It's up to Archer to put on his (slightly darker) black suit and save the day.

Lost Girl (10 PM, Syfy)

It's out of the Death Train and into the fire when Bo finds herself facing down a body jumper. Dyson rushes to find Bo, while Lauren tries to escape the Fae only to be double-crossed—and finds her past catching up with her.

Teen Wolf (10 PM, MTV)

While we digest Kira's electricity-absorbing powers, the crew has to deal with a group of creatures who seem to be prowling at a rave. Expect lots of black light.

Rick and Morty (10:30 PM, Adult Swim)

After Morty asks Rick to make him a love potion, he takes it to the school dance and finds that too much affection can be a bad thing.

Tuesday

Johnny Test (7:30 PM, Cartoon Network)

This week, we'll see Johnny and Dukey cheat to win the Red Gush contest. Then, Johnny X will face off against Boy Drone X.

The Originals (8 PM, The CW)

Discovering blood and guts isn't a good thing, even when you're a vampire:

Marcel (Charles Michael Davis), still angered by recent events, refuses to help Klaus (Joseph Morgan) when a gruesome discovery is made in the Cauldron. Rebekah (Claire Holt) is on alert when she uncovers the remnants of a sacrifice down by the docks and immediately realizes that it's the work of a dangerous warlock from their past. Meanwhile, when Elijah (Daniel Gillies) gets some information that Rebekah may be in trouble, he and Hayley (Phoebe Tonkin) set off to find her. At Rousseau's, Cami (Leah Pipes) comforts Marcel, who opens up and shares some details of his past with her, but things quickly spiral out of control when an unexpected visitor shows up. Finally, a violent confrontation ensues when Klaus faces off against a powerful force with an unmatched advantage over him.

Supernatural (9 PM, The CW)

Garth is back — but something very shady is going on:

After finding out that Garth (guest star DJ Qualls) is in the hospital, Sam (Jared Padalecki) and Dean (Jensen Ackles) go to check on him. Still carrying the guilt over Kevin, Dean lays into Garth about disappearing and demands to know where he's been. Garth makes an excuse and then hightails it away from the guys. Confused as to why Garth would run from them, Sam and Dean do some investigating and are stunned by what they find.

Also on tonight: Syfy's prosthetic makeup game show Face Off airs at 9 PM, and the theme is "Dragon's Breath."

Wednesday

Arrow (8 PM, The CW)

Things are looking no brighter for Laurel this week while Oliver deals with the complexities of taking on an apprentice.

Arrow (Stephen Amell) offers to train Roy (Colton Haynes) so he can learn to control his newfound super-strength. However, Roy is a rebellious student and refuses to listen unless Arrow reveals his true identity, which Oliver refuses to do. Meanwhile, the Bronze Tiger (guest star Michael Jai White) escapes from prison and steals Malcolm's earthquake machine to sell to the highest bidder. Oliver, Diggle (David Ramsey) and Felicity (Emily Bett Rickards) attempt to stop the transfer, but Roy gets in the way, putting everyone in danger. Laurel (Katie Cassidy) is disbarred and spirals out of control. Moira (Susanna Thompson) is thrilled when Walter (guest star Colin Salmon) asks her to dinner, but his reason surprises her.

Dreamworks' Dragons: Defenders of Berk (8 PM, Cartoon Network)

In "A Tale of Two Dragons," Hookfang and Stormfly quarrel while the town prepares for the harvest.

Revolution (8 PM, NBC)

Revolution is at its best when it keeps personal drama to a minimum, but when Monroe leads Charlie on a mission, uncomfortable interactions are sure to follow.

Monroe (David Lyons) leads Connor (Mat Vairo) and Charlie (Tracy Spiridakos) on a risky mission, as Miles (Billy Burke) and Rachel (Elizabeth Mitchell) keep an eye on things in Willoughby. Meanwhile, Neville (Giancarlo Esposito) gets a new assignment and Aaron (Zak Orth) reunites with an old friend.

Nova (9 PM, PBS)

This week, the show tackles the mysteries of some of Ireland's bog bodies, hunting for clues to their identities and the circumstances of their deaths.

The Tomorrow People (9 PM, The CW)

Stephen is suspicious of all the new people in his life, and that probably isn't a bad instinct.

Stephen (Robbie Amell) feels uneasy about his fellow trainee Hillary (guest star Alexa Vega, "Spy Kids") who has a secret agenda of her own. Stephen's mom wants the family to go camping including her new boyfriend Peter (guest star Robert Gant), whom Stephen seems to be having a difficult time reading. Knowing he is going to be out of town, Stephen asks for Cara (Peyton List) and John's (Luke Mitchell) help to make sure that everything is ok with Astrid (Madeleine Mantock) while he's gone.

American Horror Story: Coven (10 PM, FX)

How will American Horror Story wrap up its series of witchy madness? The episode description promised that "A new Supreme rises."

Also on tonight: The third season of Cartoon Network's Ninjago: Masters of Spinjitzu premieres at 7 PM.

Thursday

Community (8 PM, NBC)

This is Community's first episode after Troy's post-apocalyptic departure, but at least Dan Harmon and his crew lined up a fantastic consolation prize: Nathan Fillion.

It's time for the midterm dance and Annie (Alison Brie) sets about getting the Greendale cafeteria ready for the festivities. She and Professor Hickey (guest star Jonathan Banks, "Breaking Bad") team to navigate Greendale's custodial corridors of power and must negotiate with Bob Waite (guest star Nathan Fillion, "Castle"), the politically savvy Greendale head custodian, and his right-hand man Lapari (Kumail Nanjiani, "Franklin & Bash"). They must also contend with Debra Chambers (guest star Paget Brewster, "Criminal Minds"), Greendale's head of I.T. and Waldron (guest star Robert Patrick, "Identity Thief"), Greendale's head of parking, in what becomes an increasingly complex hierarchy of staff.

The Vampire Diaries (8 PM, The CW)

Somehow Damon bringing Enzo a "gruesome present" sounds like a cat carrying a dead mouse home, but with more hair product involved.

When Enzo (guest star Michael Malarkey) brings Damon (Ian Somerhalder) a gruesome present and insists that they bond by committing an act of revenge, Damon makes an effort to do the honorable thing. After finding himself in awkward and confusing conversations with Nadia (guest star Olga Fonda), Matt impulsively decides to throw a party, where Caroline (Candice Accola) makes a stunning confession to Elena (Nina Dobrev), then has to face the consequence of her actions with Stefan (Paul Wesley) and Tyler (Michael Trevino). Aaron (guest star Shaun Sipos) does his best to make amends for his family's past misdeeds and start a new life for himself. Finally, Elena suddenly finds herself in a life-threatening situation with only minutes to figure out how to save herself.

Friday

Helix (10 PM, Syfy)

The members of the CDC team comes to realize that no one at the base is who they claim to be. And as you can see in the clip above, a guy can't even do something as simple as burning a field full of monkeys without things getting creepy. Go figure.

Saturday

Mythbusters (8 PM, Discovery)

Do you want to replicate the Mythbusters' experiments but would rather not blow up your house? You're in luck: this week's episode is called "*Do* Try This at Home," and it's filled with experiments that don't require ballistics training and an in-house firefighting crew.

Atlantis (9 PM, BBC America)

A word of advice: If you come across an abandoned feast in a world filled with magic and gods, don't eat it, no matter how hungry you are.

A starving Jason makes a fatal error by eating sacrificial meat. It soon becomes clear that Jason's gluttony has come at a price as he begins to exhibit strange behavior. As things spiral out of control, Hercules and Pythagoras must save him.

Sunday

If you're watching the Superbowl this week, keep your eyes peeled for the latest trailers and scifi-themed commercials. If you're watching the Puppy Bowl, be careful not to hurt yourself with all that squeeing.