Finn and Jake crossover into Farmworld Finn's dimension.

Tipped off to Vandal Savage's whereabouts, the team infiltrates a munitions deal with Professor Stein as their leader. Surrounded by some of the toughest criminals in the world, things quickly go from bad to worse when Savage realizes they don't belong there. A massive fight ensues and a piece of the Atom's suit falls off and into the wrong hands, which could potentially cause disastrous consequences in the future. Stein realizes the best way to retrieve the missing piece is to contact a brilliant man - his younger self. He, Sara and Jax head off in search of young Martin Stein, much to Rip's consternation. Meanwhile, Snart and Rory plan to steal a key element in defeating Savage but still unsure of his new teammates, Ray demands to come along on the mission.

Spread out and separated across the country, the Mad Dogs must weigh their personal desires against those of their friends' lives in order to recover all of the missing money and save a kidnapped Joel.

The best performers from the auditions are in Hollywood as they continue to sing in front of the judges hoping to make it through to the next round.

After Red's associate is murdered with a rare medieval device, Red realizes a lethal vigilante group from the Middle Ages has been restarted. Liz thinks about her next move after she is given some shocking news.

Bellamy and Kane risk life and limb to rescue Clarke. In an attempt to avoid worrying about her daughter, Abby focuses on whether to open Mount Weather as a medical facility. Meanwhile, Murphy plots to betray his former Chancellor.

Marv balks at allowing Allison to make some changes to their dermatology practice, so Amy creates a temporary position for herself in order to help them work out their differences.

It's a clash of Hollywood heavyweights when Josh Gad & Kaley Cuoco square off. Will Josh's Trump-style hair be enough to knock off the "Big Bang Theory" actress?

Katie's first mission forces her to question her commitment to the cause; Will's search for Geronimo doesn't sit well with the resistance; and Bram's girlfriend shares a secret with him.

Loman's guilt over the death of an unarmed suspect becomes a liability for the crew, forcing them to test his loyalty. Wozniak sends Harlee on an errand that reveals he has a silent partner in the big score. Wozniak realizes Donny has been withholding information. Harlee feigns cooperation with Stahl, but unwittingly leads the FBI to incrimmating evidence,.

Chip takes a new clown under his wing at the rodeo.

The chefs strive to create the most visually appealing ''food porn'' using only snack food; the chefs cook for a black-tie event called Beefsteak during which the diners eat with their hands; diners include Colin Hanks, Max Silvestri and Matt Selman.

Blake and Jillian adopt a cat but things take an unexpected turn.

Fred wakes up with gray hair and sets out on a journey to figure out how old he is; the Mayor reminds Carrie about an arrangement they made.

Charlie decides to go a day without using his special abilities; Alex organizes a trip to Dana's cabin; Zach takes control of a life and death situation involving Dawn's college roommate.

Holmes' tentative reconciliation with his father suffers a setback when Holmes and Watson discover Morland has been keeping a secret that threatens all of their safety. Also, Holmes and Watson investigate two murders connected to a for-profit college and its illegal recruitment practices.

Jordan Klepper and Hasan Minhaj weigh Ted Cruz against Donald Trump, Roy Wood Jr. breaks down political ads, and Ryan Lizza discusses the GOP presidential contenders.

Conan is joined on the show by Jack Black, Rob Kazinsky and Ty Dolla $ign.

President Obama eyes America's overly armed police, and Larry discusses Joseph Fiennes's film role as Michael Jackson with Chris Distefano, Grace Parra and Robin Thede.

Stephen welcomes Josh Brolin, John Dickers, host of CBS News's "Face the Nation"; Environmental Activist Erin Brockovich, and a musical performance by Aubrie Sellers.

Coming Soon...

Following a lucky escape, Harry and his partner Suri are in hot pursuit of the man they suspect is responsible for Lau's murder. But with time quickly running out before he flees the country, Harry takes a major risk.

Jimmy Carr invites Sean Lock and Miles Jupp to go up against Jon Richardson and Sara Pascoe in the comedy panel show's version of the words-and-numbers quiz. Sam Simmons joins Countdown's resident lexicographer Susie Dent in Dictionary Corner, while Rachel Riley looks after the numbers and letters.

After the huge success of the Selfridge Trust, Harry whisks a large group of journalists abroad to Biarritz for a typically decadent roaring twenties affair, which soon manages to get a little out of hand. Nevertheless, the retail magnate uses the occasion to announce that the Selfridge group has purchased a raft of new department stores across Britain. Meanwhile in London, the staff are preparing for a special visit by celebrated writer AA Milne, and Grove determines to continue with life as normal, until he gets a blast from the past.

Stephen Fry goes after monsters with Sara Pascoe, Josh Widdicombe, Phill Jupitus and Alan Davies.

One month has passed since Inspector Reid returned to H Division. Drake and Reid are working once more in harmony but Whitechapel is forever haunted, and this time by a spectre with a taste for blood. Jackson feels the heat when a double murder throws light upon his recent illicit activities.

Graham is joined by Hollywood superstar Will Smith, starring in football drama Concussion, Zayn Malik talking about his own music, in his first appearance since leaving One Diection, Ryan Reynolds, reprising his superhero role in the new X-Men film Deadpool, and Catherine Zeta Jones and Toby Jones, co-starring in the hotly anticipated new film of Dad's Army. Plus music from Laura Mvula, who performs Overcome.