A woman's body is found on a party bus, and the murder investigation leads to a beauty empire. The detectives become competitive during an annual mud race.

The pressure of the game forces one castaway to contemplate throwing in the towel. Also, alliances start to crumble with the impending merge and one castaway commits the ultimate sin.

The teams meet new members before heading into a team challenge in which each member must prepare a tasting menu for a Best in Show Competition with the American Kennel Club.

When a cyber attack brings Starling City to its knees, Oliver and Felicity are pushed to their limits to contain the destruction. Life gets even more complicated for Felicity when her mother, Donna, stops by for a surprise visit. Ted questions Laurel's motives. Thea buys an apartment with Malcolm's 'estate' money.

When Clarke discovers a horrifying project being carried out in Mount Weather's medical ward, she joins forces with an unlikely ally. After Abby confesses to committing a crime, Kane issues an order to have her brutally punished. Meanwhile, Monty warns a distracted Jasper that Clarke could be in trouble, and Octavia continues to fight for Lincoln.

Jordi makes his move after Leo abandons Emma. Then, Hunter, a new patient at the hospital, puts Kara off balance. Meanwhile, Nurse Jackson does all she can to keep Charlie at Ocean Park and, in doing so, sides with Dr. Grace, Dr. McAndrew's ex.

Alvey fantasizes about revenge and questions his self control; Lisa's father comes to town; Nate's love life heats up; Keith and Ryan struggle with loneliness during Family Day at the halfway house; Alvey advises Lisa to forgive Ryan.

Mike and Frank have an encounter with a real-deal motorcycle legend. After receiving a VIP pass to a unique mancave, rare items that are old and odd are uncovered.

Almost a century ago, paleontologists found the first tantalizing hints of a monster even bigger than Tyrannosaurus rex, perhaps the largest predator ever to roam the Earth: spectacular fossil bones from a dinosaur dubbed Spinosaurus. But the fossils were completely destroyed during a World War II Allied bombing raid, leaving only drawings, questions, and a mystery: What was Spinosaurus? Now, the discovery of new bones in a Moroccan cliff face is reopening the investigation into this epic beast. What did it feed on and how? Why did it grow so big? We follow the paleontologists who are reconstructing this terrifying carnivore, revealing a 53-foot-long behemoth with a huge dorsal sail, enormous, scimitar-like claws, and massive jaws tapered toward the front like a crocodile. Bringing together experts in paleontology, geology, climatology and paleobotany, this NOVA/National Geographic special brings to life the lost world over which Spinosaurus reigned more than 65 million years ago.

The BAU is stumped to find the common denominator among male victims in Montana, making in difficult to profile the UnSub. JJ confronts her feelings about her sister's tragic death.

Best friends Perry Gilbert and Mia Harris sneak into the woods with Mia's young sister Zoe in tow. Their search for the mythical Glasgowman leads to a series of violent events, leaving Zoe gravely injured and the other girls missing. While Detectives Rollins and Carisi work to locate the suspect, Sgt. Benson digs through the stories to distinguish fantasy from reality.

Jake teams up with an enigmatic woman to track down a missing driver, before a crime war breaks out. Leslie extends her help to Jake and the Doyles, even though she hasn't been cleared by her therapist. Mal and Des hit rock bottom.

Following the death of a 10-year old girl the intelligence unit have one option to gain access to their suspect, go on the inside. Ruzek and Atwater act as inmates to work the case from the inside. Outside prison, Voight and Olinsky follow-up on a good lead to answer some questions about the shooting. Meanwhile, Burgess and Roman show three boys around district thinking they are part of the Police Explorers program, only to realize that's not quite the case.

After a series of alarming occurrences befall a wealthy philanthropist, the TAU investigates her beleaguered ex-husband and his much younger girlfriend. Amanda threatens to reveal Jack's dark past.

London: 1972. When a defecting KGB officer, Arkady Malinov, reveals Operation Glass, a devastating Soviet plot that could change the course of the cold war, Daddy, the head of MI5, assembles a secret team to investigate.

As the Soviets awaken a list of sleeper agents all over Britain, Daddy's team must move swiftly to gain information about the plot. But when Joe Lambe, Daddy's prized agent, becomes obsessed with the reappearance of a dangerous nemesis, a Soviet agent codenamed ?Odin', he risks letting his personal vendetta jeopardize the operation.

The kids in "South Park" are playing the new Terrance and Phillip mobile game. Stan is addicted to the latest app to hit the market. Meanwhile, Terrance and Phillip aren't feeling so good about the fortune they're making on their new mobile game.

For their Quickfire Challenge, the Cheftestants visit the bar where everybody knows your name, Cheers, where they must create a tasty bar snack for special guest judge George Wendt, the actor who played Norm on the hit TV show. Then, Top Chef Masters alum Michael Schlow welcomes the chefs to his Italian restaurant, Via Matta, for the Elimination Challenge where the chefs must work in teams to write and create a three-course Italian menu. The team whose menu is ordered the most wins while everyone else is up for a double elimination! Joining the judges is actress Emmy Rossum, star of Shameless, who throws the chefs for a loop when they must make last minute adjustments to accommodate Emmy's gluten-free diet.

Rose Namajunas locks horns with Alex Chambers.

It is a difficult decision for Joy to make about the man she will be marrying. Victoria's film proves to be very challenging. Elka attempts to bring film jobs to Cleveland.

Pete is dating a girl who has seizures during sex. Andre starts wearing glasses. Taco's frittata friend teaches Jenny to cook.

Stanley smooth-talks Elsa while planning to abduct and kill the Tattlers so he can sell their bodies to a museum. However, Elsa has her own plan for getting rid of the sisters so that she can command the spotlight. Meanwhile, Dandy picks out his first victim, and Desiree gets some encouraging medical news.

Joel's special guest tonight on "The Soup" is Will Arnett.

In the wake of Haskell declaring his love for Nicki, Holly tries to play cupid. Stuart secretly arranges for Phil to get together with his high school crush.

A detective enters the perverted mind of a perpetrator, a retro action hero infiltrates a crime boss's compound, and President Obama addresses the critics within his party.

John Cleese

Howie Mandel, Deepak Chopra, Bleachers

Fiona arranges an appointment with a suspicious lottery winner as a client. Gina has nothing but boredom to complain about. A patient's elderly girlfriend wants him to leave his job.

Sen. Kirsten Gillibrand

Tonight guests are singer-songwriter Bette Midler and comedian Jim Gaffigan.

Bridget Everett, Hari Kondabolu and Jeffrey Ross compete to determine who has the funniest take on the day's pop culture.

Seth was joined by Elijah Wood and Cecily Strong, plus music from Ella Henderson.

Bob Newhart, Melissa Rauch

Ian and Ann are challenging the norms in their suburb to build a modern and sustainable home that is clad in water tanks. It's a game of invention and ingenuity for a $1.8 million investment.

Tommy is in Epsom at Derby Day to execute the mission given to him by Major Campbell which is kill a high-ranking member of the military establishment. Tommy plans to turn the situation to his advantage by bringing his gang to the racecourse and strike against gang boss Sabini.

A huge hole has been excavated and police are looking into it. Furthermore, Larry Bishop's invisible dogs have disappeared without trace, and Andy and Lance now have one last chance to discover their hearts' true desire.

Dylan sets about tracking down Phoebe, who hasn't returned any of his messages, but when he and Luke turn up at her family home, they receive unexpected news. In a flashback to six years earlier the friends are at a pub quiz and Dylan is terrified that Phoebe is pretty much the female version of his best mate. Back in the present, Luke, in a rare reflective mood, pressures Dylan to finally tell Evie he loves her.

The Titans compete against each other to prove who is the better gender.

To impress Connie's parents, Steven asks the Gems to fuse together to pretend to be his mother.