Mike goes undercover as an AWOL Marine in order to find a rogue military officer. A beautiful undercover agent pairs up with Mike to help him solve the crime. Back at the SSC, Billy undergoes training with the help of Zoe.
When Nick agrees to defend Letitia in the murder case of Dutch George, he is shocked to learn that his mother is on the prosecutor's witness list. Meanwhile, Jeremy plans a surprise concert for Nola; Patrick tries to clear his mind of his wife's death; and Brian heads to Brazil to kidnap Brian Jr.
Christine is distraught when Ritchie stops saying "I love you" to her. When she reveals her distress to Matthew, she also admits that she's been sleeping in Ritchie's room every night. Matthew tells her that if she's not careful, Ritchie will end up like him -- he can't go to sleep without talking to their mother. They spend the night helping each other break these habits.
While Orel is on the hunting trip, the lives of Ms. Sculptham, Ms. Censordoll and Nurse Bendy are shown in disturbing detail.
When the team learns that a wealthy investment banker found murdered inside his locked safe room was living a dual life and skimming millions from clients, Patrick Jane sets up a mental conundrum to see which of the suspects will show their true colors.
Thirteen brings her one-night stand to the hospital after the woman has a seizure. However, the woman admits she slept with Thirteen just so she could get to House and have him diagnose her condition. Meanwhile, House continues to pay Lucas to spy on Wilson.
A local priest may be protecting drug dealers; Dutch and Billings close in on attempted cop killers; Corrine learns uncomfortable truths about Vic.
The team investigates a woman that re-appears after weeks of being missing with a rare disease. She also inexplicably causes pain and death to the people she meets. During the investigation, dangerous level of radiation are detected. Walter obsesses about cotton candy; Peter strikes a deal with Nina Sharp; and a truth about Olivia is discovered.
This episode demonstrates the production processes for microphones, hot tubs, artificial turf, beer steins.
The team discovers a long festering secret which sets off a deadly chain of events when they investigate the disappearance of the teenage son of a Secret Service man.
Cassie and Charles's love is threatened, and someone is lost forever.
Mike helps saw down a giant concrete wall at an auto dealership in order to make way for a new wash bay. Then he heads to a sheep farm where he tries shearing and castrating a sheep and is treated to a pate of Rocky Mountain Oysters.
A demented family covets a woman for a strange collection; the creator of a Web series about unsolved murders makes a shocking find; a wrong turn sends partygoers to an unusual underground rave; a ghost issues a special message to a woman.
A sunscreen experiment goes awry in the presence of a bikini-clad woman; an escaped mental patient seeks refuge in an office; the main course at an exclusive dinner party shocks a lady guest; partygoers encounter a crazed cult.
The investigation of a famous dead astronaut found in Battery Park has hit a dead end, causing Stabler to ask for assistance from his old mentor, Dick Finley, a former colleague of the victim and an astronaut himself.
Gibbs' hunt for the killer of a marine puts him on a collision course with an old friend.
Tim and Tarquin's family has outgrown their house. The lack of bedrooms and angled walls on the main floor have them wondering what to do. Designer Hilary and Realtor David want to help the family with their housing problems. Hilary and her team will renovate the major problem areas of the house to make the family love it again. David will search for houses that will convince the family to leave. And after all the work is finished, Tim and Tarquin will have to make a decision about their house. Will they Love It? Or List It?
Lauren and Audrina travel to Cabo for Brody's birthday, but Audrina's problems with Justin threaten to ruin the festivities. Back in LA, Spencer gives Stephanie's new boyfriend a hard time over dinner.