Christine finds out a secret about Jeff after they rekindle feelings for each other at Richard and New Christine's wedding. Matthew continues to date Amy, and Barb meets a possible love interest.

The season 8 finale live from Nokia Theater in Los Angeles, features a reunion of the Top 13 finalists before naming this season's winner.

In one of its most difficult cases, the BAU is called to Detroit to help track down a serial killer who forces the team into Canada to catch him.

The BAU continues its search for a serial killer who has forced the team into Canada to catch him and has placed a team member's life in danger.

Could a skydiver whose parachute failed to open hit a playground see-saw and send a small girl flying seven stories high? And would she survive?

When Gary fixes Allison's garbage disposal, he and Allison find each other in the bedroom repeatedly.

Detectives Lupo and Bernard investigate whether a serial killer is targeting homeless men and discover that a copycat may be at work.

A Team USA injury becomes a nasty infection, while one of the Brits struggles with a career-threatening mental problem. Then, after the next preliminary fight, Dana is forced to make a controversial decision that could blow the competition wide open.

The wife of former presidential candidate John Edwards and the author of the new book Resilience: Reflections on the Burdens and Gifts of Facing Life's Adversities, Elizabeth Edwards.

Tonight Stephen welcomes the senior astronomer at the SETI Institute in California, Seth Shostak.

The blue team's decision leaves more than one contestant upset.

International film star Isabella Rossellini, actor-turned-musician Juliette Lewis and impressionist and comedian Alistair McGowan join the host for the usual mix of chat, comedy monologues and audience participation