While coping with the realization that Sarah still has feelings for Bryce, Chuck must assume his toughest cover yet by going on a mission as Sarah's husband. The team must foil the plot of a politically connected counterfeiter, who may be endangering the lives of Anna, Morgan and Anna's parents. Both Morgan and Anna also find themselves in the cross hairs.

From their swampy origins to modern machine molds, host Alton Brown shares the sweet, sticky science behind homemade marshmallow.

Brenda finds an opportunity to visit home when she attempts to track down a witness who disappears to Atlanta. Unfortunately, once she finds the witness, her holidays with family take on a whole new meaning.

In Texas, Peter faces off against former friends due to Adams misleading story about the Shanti virus. Micah enlists the help of his mother to rescue Monica. Maya is shocked when she learns the truth about her new friend Sylar. Elle tries to make her father proud.

After a power outage, Lauren suddenly becomes paranoid about every little thing and worries that she isn't ready to take care of a baby. Andrew, on the other hand, is feeling very confident about his parenting abilities - until he kills a mock "baby" at their infant CPR class. Meanwhile Andrew's friend, Danny, excels in class by flirting with the 52-year-old-teacher, and Cooper uses Julie's sexy baby blog as a way to bond with the "brown baggers" at her firm.

Sam gets her father's car into an accident and pushes it into a lake, making him think it was stolen. He feels so bad for her that he ends up buying her a new car. Regina discovers clues about the accident and uses that as blackmail to force Sam to model at a party.

Returning to L.A. proves to be a challenge when Brenda's witness remains hesitant, causing her to be creative. The fallout left behind in Atlanta leaves Brenda's parents picking up the pieces while Fritz becomes buried underneath all the stress.

Stephanie tells Spencer that Heidi might bail out of the wedding, so Spencer and Heidi fight once again. Lauren and Audrina both have a date.

Owen wants Nick to report back to him with the details surrounding his wife's affair with Ikey. Meanwhile, Eddie is conflicted about whether he should reveal a secret that could end his business partnership with Nick, and Sam contests his mother's upcoming nuptials.

Crews and Reese investigate the murder of a Zen Master who was buried alive ten years ago. Crews continues to investigate his own case. He finds some proof that his partner's father Jack Reese could be involved.

A look at the funniest clips from the history of game shows and their contestants.

Riley learns a lesson in good sportsmanship after he joins Tom's basketball team.

Chrissie is shocked to learn Mark's secret and when Doug and Stuart become involved things turn nasty. Jac decides it is time she took matters into her own hands after an encounter with Michael.

Ros is exposed as the traitor within MI5. Reluctantly, Harry and Adam decide to use her to stop Yalta's plans.