As the holiday season comes around, Lauren, Heidi, Jason and Jordan are ready to celebrate. However, things don't go so well. While at a New Year's Eve party Lauren and Jason have a big fight, causing Lauren to storm off with Heidi.
Blade and Shen track down a vampire name Sands, who was used in Marcus's experiments. Krista visits her mom for the first time being turned, she also tries to get a sample of the vaccine and accompanies Chase to a AA meeting.
Mike first goes to Sacramento, CA to help repair railroad tracks. Mike then heads to Louisiana to learn how to make "boudin" (Cajun sausage). Mike then cuts and fry's pig skins to make "cracklin" (pork rinds). Finally, Mike goes to Oklahoma and joins a skull cleaning business to learn how to clean skulls and bones using beetles and maggots, including a whale carcass.
After a game of street hockey, Sean takes some sleeping pills believing they are painkillers and it has an unwanted consequence. In the meantime, Tommy and Angie decide to go on their fake date that they know will upset Janet. After having a close call, Lou gets a new angle on firefighting from his Uncle Red.
Hollywood comes to Las Vegas and Todd Brunson does dad proud with a bluff. Sammy Farha, Antonio Esfandiari, Mike Matusow, Minh Ly, Fred Chamanara, Jennifer Harman, and Daniel Negreanu join Brunson for another High Stakes Poker cash game.
Samson becomes a teen idol to the Squirrel Scouts. He then tries to hide from the girls and chase him around.
The television crew which makes Blighty's Hardest Pubs drops by The Clansman and Bobby foolishly promises them all the action they can handle.
Nicole has things to attend to, so other members of the family have to babysit Kyle, who's having trouble processing the little white lies that his family tell. Meanwhile, Steven learns that he'll have to lay off employees & Amanda freaks out over a fender bender.
Day 5 commences with Chef Gordon Ramsay giving a lesson to the remaining contestants in the art of culinary flavor while attempting to complete at least one dinner service.
Brenda finds herself involved in a cover-up of her own when she helps the PHD investigate a non-priority case. Why? Because the deceased woman was found in Provenza's garage...Once again, the team finds themselves racing against the clock before the LAPD brass discovers what they're up to. Will Brenda be able to protect her team and their hard-earned trust?
Dave looks to enact vengeance on everyone who has done him wrong in the past after signing a sweet new deal. Meanwhile, people suddenly charge him a lot more money for even the most trivial things that used to cost very little.
Local politician Tommy Caffee's life gets complicated when his gangster brother returns home to Providence.
When Brock is reactivated by O.S.I., he subcontracts his ex-girlfriend, Molotov Cocktease, to protect the Venture Compound from enemies.
In a short resolution to season three's cliffhangers, it turns out that Garcia and Dangle are pulled out of the car safe (and naked), and, unfortunately, the call placed to the prison was a wrong number, so Craig is killed. Six months later, Wiegel comes back from her "personal leave" pregnant. It turns out that it was not Craig that impregnated her, but rather via a sperm bank that Junior and Dangle may or may not have contributed to. Also, Carrot Top goes insane in a Harrah's hotel, throwing furniture out of the presidential suite, shooting at people and stealing police cars.
Isabelle seeks revenge on the Nova Group after they attack Shawn. Alana confronts the man responsible for killing her husband and son in a car accident nine years ago.
Tolliver looks for a representative, the Captain calls Dan out, Swearengen continues to be perplexed by Hearst's moves, and Alma and Ellsworth's relationship takes a turn.
Paris and Nicole throw suprise commitment ceremonies for unwed lesbian mothers.