Thirteen brings her one-night stand to the hospital after the woman has a seizure. However, the woman admits she slept with Thirteen so she could get to House and have him diagnose her condition. Meanwhile, House continues to pay Lucas to spy on Wilson.

While on the hunt after a marine's brutal murderer, the NCIS team and Gibbs find themselves working against FBI Agent Fornell yet again.

Eddie opposes the release of the man responsible for his mother's murder, and a close friend is lost.

The results are given for this weeks episode, and another dancer is eliminated.

The teams are put through the most unusual workouts yet and receives their six week reports by Dr. Huizenga. Then, a challenge on a balance beam rewards the winner with something special from home.

Rita skips out on Shannon's karate lesson to jam with the band and lies to Shannon about it. When Hallie exposes the truth, Rita tries to make it up to Shannon by buying her a dog. Meanwhile, Kip is determined to stay in the band against Hallie's wishes.

Mark Oliver Everett, lead singer of the Eels investigates the father he hardly knows: quantum physicist Hugh Everett III (1930-82), who formulated Many Worlds Theory (which postulated the existence of parallel worlds) back in 1957. Hardly noticed back in his time, the theory is now embraced by science fiction and scientists. His son discovers that this rejection caused Hugh Everett III to turn his back on quantum physics.

Rusty finds out a secret about Dale's high school friend and fellow Purity Pledge member, but is uncertain to tell Dale what he knows. Meanwhile, Ashleigh, as the new ZBZ president, finds herself in the middle of a battle between Casey and Frannie as they pursue the Omega Chi's for partnership for the coming school year.

Mike works at an automobile dealership where the job is sawing down a giant concrete wall to make room for a new wash bay, then heads to a sheep farm where he tries his hand at sheep shearing & castrating before getting treated to Rocky Mountain Oysters.

The team investigates a woman that re-appears after weeks of being missing, with a rare disease and she inexplicably causes pain and death to the people she meets. In the investigation dangerous level of radiation are detected. Meanwhile, Walter obsesses about cotton candy, Peter strikes a deal with Nina Sharp and a truth about Olivia is discovered.

Megan's relationship issues with the opposite sex reach a new level when she realizes that Jacob is still interested in his ex-girlfriend and Charlie decides to put the brakes on their friendship. Meanwhile, Laurel is persuaded by Megan to include Sage and Rose in her marketing campaign.

Jason Sands, a wealthy banker and political contributor is found dead inside his residence vault. After being tortured, he had bled to death in his vault. Patrick and the team delve into Jason's private life to find the murderer.

The murder of an astronaut points to a serial rapist, but when the trail turns cold Elliot asks for help from an old friend who may further muddy the clues.

A priest might be harboring drug dealers. Dutch and Billings are close to finding two attempted cop killers, and Corrine learns some things about Vic.

The teenage son of a Secret Service agent disappears; a long festering secret that set a deadly chain of events in motion is discovered.

Eli has his vision back with a beautiful brunette singing to him. The lady is Grace who turns out to be very much real and not just a vision after meeting her. Eli and Grace fall for each other. The same week Eli represents a father attempting to stop his son from receiving a military burial.

The doctors must save Saira after the explosion; Robert and Anna take a major step; Claire and Kyle become friends again; Patrick and Jagger have to stop a bomb from going off.

Segments:

-Politicians pander to local sports teams

-Socialist McCain is dead

-John Hodgman talks about his new book



Christopher Buckley discusses his book, Supreme Courtship.

Tonight Stephen welcomes the chairman of the Home School Legal Defense Association and chancellor of Patrick Henry College, Mike Farris.

When the badly decomposed body of a Hasidic man is discovered on disused wasteland, Harry is tasked to investigate his death, and to treat the community with care. Everything points towards a brutal anti Semitic murder by a polish labourer - but when the time of death contradicts his wife's last sighting, Harry becomes suspicious.

Meanwhile, Leo investigates the death of a female Australian backpacker at a house party. The partygoers are saying it is a straightforward drug death, but markings on her body suggest a sexually motivated crime. Leo finds himself being given short shrift by her friends as he tries to piece together the moments leading to her death.