Brennan and the Mutant X team join forces with a time traveling mutant to diffuse a bomb threatening devastating consequences.
On a temporary leave from military duty in Iraq, Martin's father pays the Camdens a visit to help his son decide whether to forgo college for a career in professional baseball. However, the visit turns sour when Martin catches his father kissing Roxanne. Meanwhile, Chandler and Paris reevaluate their relationship in the wake of her ex-husband's return, and Roxanne comes to blows with Martin's aunt over their differing views on the war in Iraq. Lastly, Vic tries to join the Marines and talks to a supervisor over the matter.
Paris and Nicole get a job working with a taxidermist; Paris is homesick and relies on Nicole to cheer her up.
Sin City screeches to a halt as a massive power outage brings down the light of the strip, locking down the Montecito, while a mysterious hotel guest is shot on the casino floor. In the midst of the blackout, super sleuths Nessa and Delinda attempt to find the casino killer, while a semi-delirious Sam flirts with paranoia as she suspects the murder to be part of an elaborate cover-up. Elsewhere, a trapped Danny and Mary spend the blackout rehashing some old feelings, while a claustrophobic Mike works tirelessly to free Ed and himself from the lockdown surveillance room.
When George Michael is a rejected by a private school due to the family's reputation, Michael hires a publicist from his gym who he's been flirting with to change the public perspective of the Bluths. Meanwhile, Tobias is sent to Boston to reclaim his medical license.
Will a college rowing team be able to pull Jamie up on water skis? Can the rhythm of soldiers marching together cause a bridge to collapse? Does the bacteria from a toilet settle in your toothbrush?
Marge writes a romance novel with characters based on Homer and Ned Flanders that becomes a hit. Meanwhile, Homer gets fired from the power plant again and becomes an ambulance driver.
Larry David has a huge problem with name tags. In the process Larry reveals a bathroom preference that disgusts Jeff. Ted Danson makes another great cameo.
Peggy's entry into the art world is rejected at first, then applauded by a dealer whose promotional method leaves her drawn.
Jason breaks up with Phoebe when he finally learns her and her sisters are really witches. Meanwhile, Richard attempts to free himself of his family's karma, and Piper and Paige try to vanquish a group of Swarm Demons, the last on Chris' list of the most significant threats to Wyatt.
When Wanda quits her job after getting passed up for a promotion, she tries to re-channel her energies toward Bernie. The togetherness starts to wear thin, however, when she upsets Bernie's writing process as he prepares for his talk show appearance on "The Ellen DeGeneres Show." Meanwhile, Jordan wants to become friends with the big boys on the block, and figures the best way to do it is to hook one of them up with his older sister, Vanessa.
Josh thinks Drake's flirtatious new girlfriend is interested in him too and sets up a sting operation to find out the truth.
Jamie Cruickshank, a bartender at the Maid in Splendour public house, is keen on Bella Monday, a barmaid, and follows her to a tumbledown old cottage in the woods, only to be blasted with a twelve-bore shotgun. Then the pub landlord's son, Stephen Bannerman, is also killed in the same way. Barnaby finds there was ill-feeling between locals and newcomers to the village and also between the landlord and his aggressive son, who was in the process of taking over the business.
Carrie gets upset at Aleksandr for being inconsiderate of her feelings about Samantha's cancer. When her new family outgrows her apartment, Miranda considers buying a house in Brooklyn. Charlotte receives a dog and names her Elizabeth Taylor. Samantha's hair falls out as a result of chemotherapy.
Tina tries to get over her concerns about the new sperm donor. Tim decides to throw a dinner party and invites Marina, making Jenny feel uncomfortable. Alice runs into her abusive ex-girlfriend. Dana has her eye on a chef, but is hesitant to make a move on her.
Jamie's babysitter coerces Malcolm into doing a "small" task for her; Dewey finds a friend, only to lose him to Reese; Francis persuades Otto to confront an old adversary that once courted Gretchen.
The hospital staff have an intriguing case on their hands when local tramp Sebastian Fox is found dead. Ken Hopkirk rummages through his belongings and is surprised to find war medals, leading to the discovery that he was a decorated Navy hero. When a relative is traced but refuses to help with funeral arrangements, the Royal team decide to give him a fitting send-off by scattering his ashes at sea. Meanwhile, Jeffrey Goodwin is shocked to discover a farmer's cattle herd have contracted a disease which has passed into cheese that's available in the area, and Jill Weatherill, Matron and Sister Brigid encounter a runaway girl.
Rush and Valens re-open the case of a 25-year-old black woman, who was murdered in 1939, after the woman's granddaughter comes forward with new information. The woman was assumed to be a prostitute murdered by a client, but letters written by the victim indicate that she was afraid of a milkman.