Rochelle decides to help tutor Chris for a math competition in algebra, when Chris doesn't think she's helping he turns to his grandmother Maxine for help. Tonya blackmails Drew when she takes the blame for breaking Julius' favorite chair for Drew.

Christine realizes that one reckless evening may have jeopardized her chance to begin dating Mr. Harris.

Eighth-round competition includes a ballroom dance and a Latin dance from each couple.

Andy goes on the first of his four hometown visits with Bevin in Seattle. She greets him enthusiastically by jumping into his arms. Andy says that the chemistry he feels with her is the strongest of any of the remaining women. She's brought him to Snoqualmie Falls, about 30 minutes east of Seattle, because it's one of her favorite places. One member will reveal a secret that may get her eliminated.

Lily and Marshall's wedding day arrives, but nothing goes as they had planned. Surprisingly, Barney steps in to save their once-in-a-lifetime moment.

Jack is held in custody at CTU, while Cheng prepares to launch a surprise attack.Lennox uses Lisa as a plant to send a false message to the Russians in hopes of defusing a tense situation.Morris' decision to end his relationship with Chloe begins taking its toll on her as they struggle to maintain professionalism, and Josh shows signs of guilt over the role his father played in the day's terrorist attacks.

Jessica and D.L. discover some of the stuff that Linderman wants from them and Micah. Sylar questions his path when he realizes what he is predestined to do and reunites with his mother to seek validation. Hiro and Ando follow him, and Hiro's resolve is tested when he realizes the enormity of killing another human being. Meanwhile, Angela Petrelli tries to convince Nathan to go along with Linderman's plan. And Peter tries to prove to Claire that they are both destined to save New York. Also there is a new hero who is supposed to be holding the key to stopping Sylar.

Charlie is shocked when the handyman working on his house beats him out for Chloe's affections. Alan has no sympathy for Charlies distress.

See what lies beneath the city that was the heart of the Roman Empire.

Seeing friends who recently had a child makes Doug and Carrie consider adopting.

Alex and her mother Emily are in trouble - Chad, Emily's boyfriend, has run up thousands of dollars in credit card debt and hasn't been paying the rent. The situation is dire and Alex needs to make more money than she can at the theatre - when a job as a waitress at a 'gentleman's club' comes up, she takes it - but learns there's bigger money onstage. Alex has to decide what to do - and how maybe more-than-friend Paige will deal with the situation. Meanwhile, Emma wants to make plans for next year and is shocked to learn Sean's don't include her. As well, Marco does his best to keep his best friend close.

After the murder of a suspected carjacker the team discovers that he may have been involved with a formidable drug lord and was suspected of drug running off Miamis shores.

Jimmy wants a bigger piece of the earnings and asks Dokey to do so, but first he must complete another job for him. Tommy, Kevin and Joey help reappraise Reilly's diner while at the same time, Tommy tries to find out who murdered his father. Jenny finds closure concerning her missing husband.

The family finds itself in awkward situations when Wayne is offered a partnership at Panco only if he throws a dinner party that meets Hugh's approval. Meanwhile, a former cellmate of Dahlia's on the search for a job wants to be the family's maid.

Tonight, author Lee Gutkind promotes his new book Almost Human: Making Robots Think.
Jon begins the show with an in depth look at the Republican presidential candidate debate last week in a continuing show segment, "Clusterf@#k to the White House". Senior Correspondent Aasif Mandvi reporting live from the gates of hell talks with Jon about John McCain's comment at the debate that he will hunt Osama bin Laden to the gates of hell in a segment called "Styx & Stones". Finally, John Oliver gives us a behind the scenes look at the Republican debate.

Tonight Stephen welcomes journalist and author of The Wild Trees: A Story of Passion and Daring, Richard Preston.

Segment #1 - Meagan and her boyfriend are at a stop light when an old lady drops a bag of fruit. When they get out to help her across the street, two guys jump in their car and take off. A witness tells the police they pushed the lady down. She calls her cell phone and the police tell her to keep them on the line.
Segment #2 - Jewel and her friend pull into a restaurant and they tell her to move because they are putting in a new sign next door. The crane drops the sign on a car and they yell at Jewel for letting it happen. Jewel gets mad for blocking her in and refusing to let her go.
Segment #3 - Frankie J thinks he's meeting with Michael Jackson but when a fan gives him peanuts, they tell him Michael was alergic and is very sick. They ask if it was Frankie but he denies it.

The team investigate the death of Dr Alan Delaney who was killed whilst driving his business partner's car. As they look further into the death they wonder if his partner Dr James Kirkwood was in fact the intended victim.

This week the show looks at whether it is still possible to get away with murder. With the improvement of science it looks at why some crimes are still unsolvable by the police.

It's the morning of Moz's wedding and he's woken up next to another woman. Now all he has to do is get rid of her, overcome his nerves, deflect the advances of a very demanding Judith and save Brian from a psychopathic Christian.