Lorelai is determined to win the Stars Hollow Dance Marathon and wrest the trophy from four-time champion Kirk, but has trouble getting a partner until she finally convinces Rory to help her dance her way to victory. Dean sits on the sidelines to cheer his girl on, and is soon joined by Jess and Shane, who spend their time making out while Jess keeps his eye on Rory. Lorelai breaks her heel, and Dean takes her place while Luke plays shoe repairman. On the dance floor, Dean realizes that Rory is attracted to Jess and breaks up with her. Rory tearfully runs off, followed closely by Jess, and Kirk is declared the winner once again.
Ryan from Stray returns and Clark has to save him from Dr. Garner of the Summerholt Research Facility. Meanwhile, Aunt Nell leaves Smallville, and Lex wants to expand the plant but runs afoul of the mayor.
Nick takes on the case of two children after their brother dies from their father's neglect.
Dana gets accepted to be on the reality show The Bachelor. Jim gives her advice on how to keep a man interested. When Dana and the bachelor visits Jim and Cheryl for dinner, the bachelor reveals to Jim he only wants to get Dana in bed.
Andy's parenting skills are questioned when Ephram and Delia's grandparents pay them an unexpected visit to check up on their son-in-law. Meanwhile, Ephram sneaks out of the house to see Amy who is still emotionally recovering from the aftermath of Colin's surgery.
Gary Coleman moves in the building and Nikki asserts herself as his manager and gets him fired from his job. Nikki tries to make it up to him by creating his own talk show.
Mona and Dee Dee are half-sisters with the same father who didn't really know each other when they were little and are complete opposites, but as adults they live in the same apartment building and at least try to bond.
Maya hears upsetting rumors about Darnell and a female coworker; Joan, Toni and Lynn attempt to repair Maya's marriage woes.
At a wedding, Doug takes a naughty picture with a disposable camera supplied by the bride and groom. After letting Danny take the blame, and after confessing to a priest, he has the dreaded task of coming forward with the truth.
A failed television presenter, now presenting a programme on local desperately tries to revive his broadcasting career.
Eric Camden, a minister, and his wife Annie deal with the drama of having seven children, ranging from toddlers to adults with families of their own.
Dylan sets out to find an assassin known as The Leper who is trying to kill his good friend.
Jordan and the team are sent to lead the recovery effort at the site of an explosion. Amongst the rubble is a lone survivor and Jordan must keep him talking till help can get to him. The grim task of identifying the victims falls on Dr. Macy.
Horatio and his team must uncover the evidence in the brutal murder of an entire family in their own home. The only survivors are a blood-soaked toddler, and the father who's in surgery. The immediate assumption is that the mother is responsible – post-partum depression – but the evidence discloses a different outcome.
Ray and Debra are excited to have finally met a couple, Neil and Lauren, who are just like them. However, Ray starts having mixed feelings when their annoying year-old son, Spencer, wreaks havoc around the Barone household.
The rapid increase in global warming is traced to a ventilation flaw that Professor Farnsworth failed to correct in his first robot prototype. As a result, all robots are ordered to be destroyed, but Bender refuses to go without a fight.
Larry proves himself an unskilled Christmas tipper, while both Larry and Jeff prove incompetent at creating believable alibis for the messes they get in. After offending his housekeeper, Larry makes amends with her at the expense of his wife. Later, Larry attempts to reconcile with Cheryl's family after ruining their nativity scene.
Sydney's trust in her father begins to fade. Meanwhile, Sydney and Vaughn may have been exposed to a deadly virus while in Taipei Sloane haunted by Emily's death begins to unravel. Vaughn enlists Will to help research a case.
When Phoebe must constantly save the life of her new boyfriend, a warlock shows up from the future, claiming that future Cole sent him in order to kill the boyfriend before Phoebe's dies instead. However, present Cole cannot allow this and tries to help the sisters protect Miles, but when the warlock decides to work on his own agenda, by stealing the Book of Shadows, it results in the death of two of the Halliwell sisters. The survivor must decide whether going back to change the past is the right thing to do.