Chris plays a prank on Caruso on the last day of school.

Ninth-round competition features the four remaining couples performing their favorite dances, but with new music and choreography.

Three bachelorettes visit Andy's current home state of Hawaii; Andy takes the women on a tour of the USS Arizona Memorial; two women go to meet Andy's family.

It's still Marshall and Lily's big wedding day but now we're at the reception. Robin tries to tell a story but keeps getting interrupted. Barney tries his hardest to figure out Ted and Robin's secret.

During ESPY week in Los Angeles, Derwin gets an unexpected endorsement deal and is left to celebrate with Drew Sidora (guest starring as herself), while Melanie is busy studying in San Diego. Malik runs into Renee (guest star Kendra C. Johnson) an old flame, but when things heat up and she wants to spend time with him in public, he gets cold feet because she is overweight. Feeling conflicted, Malik asks Tasha for advice to sort out his feelings about Renee. Meanwhile, Jason gets a reality check when he is asked to speak on camera and conduct special interviews for ESPN.

Later, Melanie and Derwin have a heated argument about their impending engagement status. Kelly helps Tasha get new clients by using an unusual sales technique.

Jack runs a desperate tactic to free the CTU hostages from their captors. He manages to intercept Cheng, who plans to deliver Josh to his grandfather in exchange for the circuit board. Jack is forced to allow Cheng to escape in order to save Josh's life.Lennox continues to monitor Lisa as she plants evidence for Mark to deliver to the Russians. The situation takes a nasty turn when all does not go according to plan. Meanwhile, Daniels tries to run a bluff on the Russian president, but finds he's playing a bad hand.Nadia finds herself facing a hostile investigation over the security breach, while a decision from Daniels pits Doyle against Jack.

Angela Petrelli is forced to play a bigger role in Nathan, Peter, and Claire's life. The truth about the death of Nathan and Peter's father is finally revealed along with his true identity. When Nathan finds out that he may have a chance to become more than a Congressman, he is confronted with a decision that he must make. As election day nears some try to leave NYC. HRG and Matt learn another surprising secret. Also, Sylar is eating another hero's brain. Hiro's dad returns.

Doug and Carrie's marital tension continues, as they ponder whether they have a future together. Arthur and Ava's wedding day turns problematic.

Goren and Eames find a scrapbook belonging to a serial killer on death row that suggests he may have had more victims than previously known.

Evelyn gets a new boyfriend, Teddy, who bonds with Alan and Charlie by taking them to Las Vegas. The boys confront their feelings about their mother dating and men coming in and out of their lives.

Discover the secrets that lie beneath Paris.

At Arthur's wedding reception, Doug and Carrie's marital tension continues, and they ponder whether they have a future together.

Alex's double life is finally bringing in the cash she wants but hiding everything from everyone is taking a toll on her schoolwork and her connection with Paige. But making money is the only way she and her mother won't get evicted - Alex tries to convince herself she's making the right decision. When Sean and Emma are not talking, she will have to go through her scariest experience yet all by herself. Marco also learns that sometimes love is very, very messy.

There's a serial killer on the loose marking all of his victims with a Y on their chests and one or more of the csi's lives are in danger in this season five finale.

Tommy decides to leave town with his family fearing for their safety. Jenny finally deals with Samson while Nicky handles Alo for the last time. After much convincing, Jimmy decides to leave with his family.

Wayne suspects that Dahlia still has a drug addiction and takes meth himself as a way of showing her how much the fact that she is on drugs hurts. Meanwhile, when things at Panco go crazy, it is up to Dahlia to keep everything and everyone together. Finally, Dale shows up at Edenfalls and befriends the family's neighbor, Hartley.

While tracking a young boy with dangerous powers, Dr. Helen Magnus encounters Will Zimmerman, a psychiatric resident who may have what it takes to become her new protg.

Tonight, BBC news reporter and author of the new book, On Royalty: A Very Polite Inquiry into Some Strangely Related Families, Jeremy Paxman.
The show begins with a clip of Bush "The Decider" taking matters into his own hands and conducting an orchestra during the 400th anniversary of the founding of Jamestown.
The fired U.S. attorney's scandal continues as Alberto Gonzalez testifies about what he doesn't remember before the House Judiciary Committee in a segment called "House A.G.". Senior Legal Correspondent Rob Riggle talks with Jon about how White House officials can never comment before, during, and after investigations into wrongdoing in a segment called "Speak No Evil".
Finally, Samantha Bee in "This Week In God" talks about the history of Mormons as it relates to current presidential candidate Mitt Romney & about a hispanic man in Florida who founded a church based on the claim that he is the Antichrist.

Tonight Stephen welcomes investigative journalist and author of The Atomic Bazaar: The Rise of the Nuclear Poor, William Langewiesche.

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