During an intense challenge, castaways attempt to crack the code and earn a spot in the Final Five. Additionally, one castaway's paranoia threatens another's stake in the game, and Tony's closest confidant is wooed by another alliance.

The final 4 contestants compete tonight to move on in the competition to become the next "American Idol".

Feeling that her mind has been turned into Swiss cheese over the kids' never ending demanding requests of her, Frankie sets up office hours in which they can only voice their needs between 5:00-6:00 p.m. Meanwhile, an overprotective Mike keeps a stern eye on Darrin to make sure he doesn't take advantage of Sue, and Brick invites his surprising new friends over to the house for a book club meeting.

Mel plans the perfect wedding day for her friend Carrie. But when Carrie calls it off, Mel wonders if she should keep all the flowers, catering and venue for her and Joe.

Meanwhile, Lennox helps Ryder lie on his resume to help him get a job.

Truman, empowered with new authority from the President, launches a mustard gas attack designed to kill Miles and Monroe. To Rachel's disappointment, Miles agrees to join Monroe in a ruthless plot to beat the Patriots at their own game. As Neville faces his own challenge from the Patriots, Aaron grows increasingly alarmed by the power of the nanotech.

Laurel and the Arrow escape the tunnel and the vigilante sets out to get the Mirakuru cure and end the threat of Slade's super-soldiers. However, when Slade gets the cure first, the Arrow must negotiate with Sebastian Blood. Meanwhile, Laurel finds her sister and Amanda takes extreme measures to contain the super-soldiers.

When Tessa takes over planning Lisa and Malik's wedding, she struggles with the limited budget and loses sight of the romance. Meanwhile, June confronts Tessa and warns her to stay away from Ryan, Malik's family decides to boycott the wedding and he enlists George's help to walk him down the aisle, and Sheila offers Lisa some pearls of wisdom.

Riley is looking forward to meeting Philip's sister from England, but her excitement soon vanishes when it becomes obvious that Georgie is less than impressed by her brother's taste in girlfriends. When Ben makes a huge mistake and accidentally lets it slip that he and Riley once dated, she tries to convince Philip that he's the one she wants to be with. But will Philip's doubts about her feelings for Ben put an end to their relationship? Meanwhile, Danny's contract negotiations are in jeopardy when Bonnie tangles with the Rangers' new general manager, Valerie. Once Valerie sets her sights on Tucker, Bonnie believes she's found the perfect way to seal Danny's future with the team.

Clarke and Bellamy go on a mission to find supplies for approaching winter. Some of the 100 accidentally eat nuts with powerfully hallucinogenic properties and lose their grasp on reality. Meanwhile, Octavia seizes the opportunity to help a friend escape, and a terrifying event brings Clarke and Bellamy closer. On the Ark, Commander Shumway secretly assigns one of the 100 to kill one of his own, and the treacherous actions of Diane Sydney are revealed.

Danielle and the guys kick it into overdrive when they land a high-profile custom pick for Dollywood, the theme park owned by legendary country music star Dolly Parton. A tribute to the Smokey Mountain Fire Patrol of the 1930s, the park's brand new roller coaster wouldn't be complete without some key pieces of vintage petroliana. And the team has just two weeks to uncover a long list of hard-to-find items.

In recent years, an unusual spate of deadly shark attacks has gripped Australia, resulting in five deaths in ten months. At the same time, great white sharks have begun appearing in growing numbers off the beaches of Cape Cod, Massachusetts, not far from the waters where Steven Spielberg filmed the ultimate shark fright film, Jaws. What's behind the mysterious arrival of this apex predator in an area where they've rarely been seen for hundreds of years? Are deadly encounters with tourists inevitable? To separate fact from fear, NOVA teams up with leading shark experts in Australia and the United States to discover the science behind the great white's hunting instincts. Do sharks ever target humans, or is each attack a tragic case of mistaken identity? And can a deeper understanding of shark senses lead scientists to design effective deterrents and help prevent future attacks?

When the BAU is called to Texas to consult on the murders of prostitutes, evidence points to killings with religious overtones. But as they delve further into the investigation, the team could put their lives at risk.

Benson and Murphy question renowned television producer Frank Maddox when he's accused of molesting his 8 year-old daughter Chelsea. Maddox's estranged wife, actress Catherine Summers, wants justice for her daughter but refuses to cooperate, leading the cops to suspect the accusation was a ploy to win the public's favor. With Catherine's young sister Rose engaged to Maddox and accusations flying back and forth in the media, Benson strives to help a child by discovering the truth.

Jay, Gloria and Manny challenge each other to step outside their comfort zone and try something new. Mitch and Cam's wedding is getting too big and costly so they resort to selling a couple of their prized possessions, and the kids play a joke on Phil and Claire.

The night is drawing to a close and nobody wants to go home alone once it's last call. Bruce recruits Maya to fake flirt with him to get Jessica's attention, but when things start to look like they're getting serious between them, Tom gets nervous causing Cal to spring into action. Meanwhile, Fab spots her attractive gynecologist and debates whether or not she'd be able to date him.

Nev and Max help out Craig who has been in an online relationship with Zoe for quite some time. The case soon gets bigger as other relationships within the same community have been ripped apart due to Zoe posting nude pictures of girls. However, Nev soon cracks the case and despite ignoring any phonecalls, manages to track 'Zoe' down.

Commander Perry notifies the Intelligence unit that Pulpo has been released to help track down a dangerous cartel leader. This doesn't sit well with our team as he kidnapped one of their own and no love is lost between sides. Meanwhile, Ruzek gets some difficult news as a blast from Lindsay's past comes back, giving us a glimpse at where she came from. Voight reminds her that she's come too far to screw it up. At the same time we learn something about Jin that is bound to be a problem.

The CSIs investigate a present-day crime with ties to a mob heist that occurred 25 years ago. Meanwhile, Brass has a decision to make when his daughter attempts suicide.

Team Edgar's Dhiego Lima looks to break the winning streak of Team Penn by knocking out Tim Williams.

The women attempt to adopt a dog but a shelter volunteer manages ruin their plans. Elka's relationships with Mamie and Roy take a surprising twist.

Rayna organizes a charity concert at Fort Campbell after finding out Luke has been injured in Afghanistan, forcing him to cut his tour short. Deacon and Maddie are brought closer together as they chart a new course for their future. Teddy is beginning to feel like his family is slipping further and further away from him. Juliette is racked with guilt knowing that her back is against the wall after Jeff threatens to go to Avery with the truth. Gunnar is feeling pressure to reveal a secret about Juliette to Avery until Zoey urges him that his professional and private life should be kept separate. And Will and Layla begin shooting their new reality series.

On this episode of "The Soup" Joel McHale is joined by Jim Rash & Rachael Harris.

Elizabeth makes a shocking discovery about Kate. Philip pursues a contact for information about stealth. Stan continues his pursuit of the illegals.

Janice and Walter stage an intervention to confront Steve's drinking unaware of a coke party Jim has accidentally set in motion in his bedroom.

Boyce decides to cancels the annual bake sale after taking on a healthier lifestyle.

Seth Rogen

Sharon Osbourne, Paul F. Tompkins, Emily Heller

David Remnick

Tonight Jimmy's guests are actor Zac Efron, television personality Guy Fieri and American football player Jadeveon Clowney. Music will be from Canadian musician Sarah McLachlan.

Also Tariq celebrates Cinco de Mayo; Dr. Seuss books that encourage bad habits; Tonight Show Meet the Players: 2014 NFL Draft; Jimmy runs 40-Yard Dash; Sarah McLachlan performed "In Your Shoes".

Mariah Carey, Rick Harrison

3 celebrity contestants compete to determine who has the funniest take on the day's pop culture.

Seth was joined by Sarah Jessica Parker, Anna Wintour and Rich Eisen, plus music from The 1975.

Patton Oswalt, Megan Boone

In tonight's elimination episode, 21 contestants face elimination for the first time with a three-round challenge. The contestants are given just 30 minutes to cook a perfect Chinese fried rice. Who will be the first contestant to go?