Orphan Black is back! While we're excited to find out what's in store after last season's big clone reveal, there's more TV goodness in store this week: Major Lazer gets its own cartoon; we learn Melinda May's secret origin on SHIELD, and The CW debuts its new angel drama The Messengers.
Gotham (8 PM, Fox)
Gordon and Bullock re-open a cold case involving a vicious serial killer known as the Ogre (a jacked Milo Ventimiglia) who targets young women, while Fish Mooney plots her escape from the Dollmaker.
The Originals (8 PM, The CW)
Desperate to find a way to vanquish Dahlia (guest star Claudia Black), Klaus (Joseph Morgan) soon finds himself face-to-face with another deadly threat - Mikael (guest star Sebastian Roché). Meanwhile, as Hayley (Phoebe Tonkin) and Rebekah (guest star Maisie Richardson-Sellers) work with Freya (guest star Riley Voelkel) to track Dahlia's whereabouts, Elijah (Daniel Gillies) and Marcel (Charles Michael Davis) prepare a safe house in Algiers with the help of Josephine (guest star Meg Foster). Elsewhere, determined to protect Hayley and baby Hope, Jackson (guest star Nathan Parsons) approaches Hayley with a risky idea that leaves her conflicted. Finally, Aiden (guest star Colin Woodell) finds himself torn between his loyalty to Jackson and his secret alliance with Klaus.
Star vs. The Forces of Evil (8 PM, Disney XD)
In the first of two episodes, Star is bummed when she doesn’t get a call from her crush, so Marco tries to cheer her up — and ends up accidentally summoning Ludo and a fresh army of monsters. Then Star and Marco have to find a new wand charger before Star’s wand dies forever. Too bad they have to buy it from the maze-like store Quest Buy.
Scorpion (9 PM, CBS)
When Walter learns Cabe’s secret about the Baghdad mission, it threatens to tear Team Scorpion apart.
The Returned (10 PM, A&E)
Lucy miraculously recovers from the stabbing but realizes she is irrevocably changed. Claire and Jack scramble to find Lena as she receives help from Adam and Peter makes a frightening confession to Victor.
Community (Streaming, Yahoo! Screen)
A hacker threatens to publish emails unless a scheduled appearance by a racist comic is canceled.
Powers (Streaming, Playstation Network)
This week’s episode is "Aha Shake Heartbreak."
The Flash (8 PM, The CW)
We’ve got another Arrow crossover when Felicity Smoak and Ray Palmer roll into town to get STAR Labs’ help with the Atom’s suit. It’s good timing, too, because meta human Brie Larvin is about to unleash hundred of robotic bees to kill her former coworkers. When rage-quitting is just too good for your employer.
iZombie (9 PM, The CW)
Veronica Mars and Party Down star Ryan Hansen guest stars this week as a professional snowboarder suspected in the death of a sorority sister. Plus, Major goes to Clive with the news that another one of his teenaged charges has gone missing.
Face Off (9 PM, Syfy)
On the season finale, the finalists must create characters that could star in a scifi, fantasy, or post-apocalyptic film.
Agents of SHIELD (9 PM, ABC)
We finally learn about Melinda May’s secret origin as “The Cavalry” while she finds herself caught at a crossroads. Plus, Skye learns a bit more about her heritage from Lincoln.
Person of Interest (10 PM, CBS)
Reese finds himself on a perilous personal journey when he takes on a homicide case Detective Carter was never able to close.
Arrow (8 PM, The CW)
Human chameleon Doug Jones plays the villain Deathbolt, who kills people with blasts of plasma and energy. When he turns his terrifying blasts on Starling City, Oliver asks Ray for help. Good thing Ray just paid a visit to STAR Labs.
Supernatural (9 PM, The CW)
Felicia Day is back, with Charlie calling Dean and Sam to tell them she’s found the Book of the Dead, which could help them remove the Mark of Cain. Unfortunately, she also gets herself shot by a man who claims the book belongs to his family and will rest at nothing to get it back.
CSI: Cyber (10 PM, CBS)
Your devices are just giving your cats more time to eat your dead body:
Avery and her team investigate the murder of a woman whose electronic devices indicate that she was alive for three days after her official time of death.
Cartoons (5 PM, Cartoon Network)
On Clarence (5 PM), Clarence eats 500 hardboiled eggs in an escalating series of dares — and starts to gross the other kids out. On Steven Universe (5:30 PM), Steven and Buck Dewey make t-shirts together. Each of the Titans gets their own video game adventure on Teen Titans Go! (6 PM) after Robin sets up a virtuality room. And on Adventure Time (7:30 PM), the Ice King plots to form the perfect circle of confidants.
The Vampire Diaries (8 PM, The CW)
With their humanity in the off-position, Caroline and Stefan go on a killing spree at Whitmore. While helping Jo treat Caroline and Stefan’s victims, Elena learns that Jo is pregnant, and reevaluates her own life as a vampire. Are we seeing the beginning of Elena’s eventual exit?
Olympus (10 PM, Syfy)
While forces plot to kill Madea, the Ring of the Magi is found by the person that absolutely should not have it.
Vikings (10 PM, History)
The Vikings go all out for a second assault on Paris. Recognizing the desperate state of affairs for his city, Emperor Charles must make a difficult decision. In Wessex, Judith is compelled to make a difficult decision of her own.
Dig (10 PM, USA)
After Peter (Jason Isaacs) has a startling breakthrough in the Emma Wilson (Alison Sudol) case, he turns to Golan (Ori Pfeffer) to search out new clues. A furious Ambassador Ridell (Regina Taylor) pressures Lynn (Anne Heche) to get Peter out of the country. In the New Mexican dessert, Debbie (Lauren Ambrose) must make a dangerous trade with Tad Billingham (David Costabile) if she wants to spare bloodshed. Rabbi Lev (guest star Shmil Ben Ari) and a new partner work deep in the underground tunnels to carry out their mission.
Major Lazer (12 AM, FXX)
The electronic music group gets its very own show starting this week. Major Lazer is a Jamaican superhero living in a dystopian society fighting the forces that ruined the world — presumably with music.
Axe Cop (12:15 AM, FXX)
The axe-wielding cop (from the webcomic of the same name) is back for another season of genre-busting mayhem.
Grimm (8 PM, NBC)
Nick and Hank’s latest case places them on the path of a Native American power quest.
The Messengers (9 PM, The CW)
In the CW’s latest series, a mysterious object collides with Earth, killing five (very pretty) individuals before they are miraculously restored to life. They are destined to meet according to a Biblical prophecy, but is this show destined to be any good? We shall see.
Lost Girl (10 PM, Syfy)
The Canadian succubus is back for a new season, and it’s starting with a trip to Hell, as Bo prepares to save Kenzi.
The Good Witch (8 PM, Hallmark)
In the first-season finale, Cassie gets some upsetting news about her store, so the townsfolk come together to offer her support.
Orphan Black (9 PM, BBC America)
Clone dance party! Orphan Black is back! Sarah gets no time to catch her breath after last season’s major reveal, and she’s going to have to act her leather pants-wearing ass off when a Topside investigator threatens the Clone Club. But what happened to Helena?
Outlander (9 PM, Starz)
While Claire and Geillis are tried for witchcraft, Claire learns a secret about Geillis’ past.
Once Upon a Time (8 PM, ABC)
In order to hide her secret, Cruella kidnaps Henry, which means she'll have both Emma and Regina on her tail.
Game of Thrones (9 PM, HBO)
We catch up with Arya in Braavos in "The House of Black and White." Meanwhile, Cersei fears for her daughter's safety while Ellaria Sand seeks revenge for Oberyn's death. And both Jon and Daenerys find themselves tempted — Jon by Stannis and Daenerys by an advisor.
The Last Man on Earth (9:30 PM, Fox)
Instead of "Alive in Tucson," this week's episode is "Moved to Tampa."
Salem (10 PM, WGN)
Mary receives help from a former foe to keep Salem in the grasp of the witches.