Chris' attempt to be a "cool" kid lands him in hot water when he is caught with cigarettes and is suspended from school. Kicking him while he's down, Tonya blackmails him when she finds out before their parents do. Meanwhile, Rochelle decides to teach Julius a lesson.

A terrorist cell infiltrates the NorBAC lab and forces the scientists to produce a deadly measles mutation to be used as chemical warfare.

Bart joins the 4-H club and falls in love with a cow named Lou, but when he finds out that Lou is destined for the slaughterhouse Bart gives the cow to Mary, a fellow 4-H member, and her father mistakes the cow for a dowry. Homer and Marge come to the rescue to try and free Bart from his marriage agreement.

Stressed that her birthday parties never live up to her expectations, Peggy plans herself a disco-themed party on a mystery train, but after Luanne ruins the surprise, Peggy worries her parties will always end badly. However, a new mystery arises after a couple sneaks away for some private time in the train bathroom, and the partygoers must figure out who did it.

Melanie tries to convince Derwin to attend a victory parade for the Sabers. He reluctantly agrees but ends up running into Janay (guest star Gabrielle Dennis), who decides to put his feelings for Melanie to the test. Meanwhile, Jason is upset that he hasn't received a contract. Hosea Sanchez, Wendy Raquel Robinson and Brittany Daniel also star

Raja has trouble with a girl named Mindy. He starts spending time with her and finds out that she is annoying. After Justin tells Raja that Mindy believes that she is dating him, Raja lies to her in order to let her down. He tells her that they can't date because of their religious differences, but things get complicated when Mindy converts to Islam. Franny and Gary deal with a neighbor who is a registered sex offender.

Kim, Khloe and Kourtney may have damaged their relationship after having an argument. Meanwhile, Bruce feels he is no longer in touch with the younger generation.

The former house guests and jury members return to the Big Brother house to vote on who should win the half a million dollars. Ryan and Adam eagerly await their fate.

Stan goes in search of a former KGB agent, Sergei, and is shocked to find that the man is his new next-door neighbor and that Sergei has already turned Steve into a communist. Meanwhile, Roger and Klaus head to France for a little R&R but their trip takes a turn for the worse when Klaus gets busted for drug smuggling.

The team re-opens the case of a woman who allegedly committed suicide in 1962 when the victim's granddaughter comes forth with evidence that the note found on the death scene -- then thought to be the suicide note -- was not written in the victim's handwriting.

Bree and Katherine decide to start a catering business together. Lynette tries to deny her feelings for Rick (guest star Jason Gedrick). Mike learns the truth about his nearly fatal accident. Carlos gets a seeing-eye dog. Dylan meets her estranged father (guest star Gary Cole).

Brian, afraid that he may have lost his last chance at love, searches for a former flame, Tracy. To his surprise, he discovers that he is the father to her son, Dylan. Tracy decides that Brian should raise the boy, and she drops him off at the Griffin's house. When Dylan runs rough-shot in the house, Brian's attitude towards parenting doesn't settle too well with Lois and Peter.

In the wake of the plummeting logging market, the Ax Men are barely surviving. The Gustafson bosses have a close call while taking over for their laid-off crew. An old hook tender returns to the Browning team, stopping Jesse's ascension to company management. Pihl loses a crucial member of the team as it struggles to finish Pig Farm. At Stump Branch, the young guns take matters into their own hands when Melvin has to leave the site.

In an attempt to solve Scotty's financial issues, Kevin offers to file domestic partnership papers with him.

Meanwhile, Nora meets with an interior decorator in an attempt to try and make a fresh start. And the Walkers attend a fund raiser for cancer research.

In the eyes of the Church, Henry's marriage to Anne is not legitimate. Both Thomas More and Bishop Fisher refuse to acknowledge Henry as the supreme head of the English Church. As a result, both are imprisoned in the Tower of London.

Despite his marriage, Henry still finds plenty of beautiful women to look at.

When Moz is rushed to hospital with a suspected heart attack, his girlfriend Nicki reignites her affair with the Police Constable. Moz's long lost dad Keith tries to offload some stolen widescreen TVs.