After Alan and Charlie have a fight about Alan's role in the house. Alan packs Jake up and moves in with his mother.
The investigation into a runway model's death leads Horatio to his son and his nemesis.
After still being convinced that Maya is not dealing with her loss, Joan decides to take Maya on a shopping spree to help her recover but surprisingly, Joan realizes that she is the one who needs therapy because of Aaron departure to Iraq. Meanwhile, Monica tells William that she is pregnant but his reaction is unlike she expected.
Michael goes after more power while he and Kath get ready for their little addition to the family. Tommy tries to fix the problems in a bad area of The Hill. Eileen learns from other politicians wives.
Palek's anxiety grows. Jamie must come clean with Nick. Katie receives some disturbing news.
When human remains are discovered at the bottom of a well, the team opens the 1938 case of a housewife who went missing the night of Orson Welles' radio broadcast of War of the Worlds.
Sebastian and Danny travel to Mexico to attempt to retrieve a defendant who left the country to avoid being prosecuted for murdering his business partner/mistress.
Jen gets promoted to Assistant Coach at The Penalty Box, only to order too much wrestling merchandise from a marketing representative when she develops a crush on him. Jen needs to sell the wrestling gear while her job is still on the line, so Jonesy, in his Wrestling name "The Stud", lends a hand along with Jude and Wyatt as color commentators. Meanwhile, Nikki's ex-boyfriend Stone returns to the mall so Nikki tries to get over him, with Caitlin's help.
After a miserable ride to London, Ewan and Charley push on to France. Despite arduous weather conditions, they must stay on a strict time course.
Stan seeks out Francine's birth parents because her visiting adoptive parents annoy him so much. But they don't annoy Steve, especially after they give him fireworks.
Ben Stillman arrives at Heartland and his treatment of his horse Red angers everyone. Ashley lures Ty to Briar Ridge with a job offer.
Larry tries to use Cheryl's therapist to get back into her good graces after getting bad advice from his own; Larry's miffed at Marty's participation level in an Alzheimer's walk
Kitty gets a visit from an old friend to do some damage control regarding her pregnancy. But it doesn't go as planned. Sarah is struggling with Paige, while Justin is down.
Lois and Peter sail off on a cruise. Jealous that he was left behind, Stewie's matricidal tendencies are rekindled. When Brian challenges him to actually do it, Stewie carries out his diabolical plan.
Zoey starts dating Dean Rivers' son. Meanwhile, Logan makes a dance video for girls so they can dance with him from the TV. Chase and Michael struggle to make 26 more cartoons for the end of the month, and end up getting sued by Friday Night Live for their idea of two bowling pins afraid of a bowling ball rolling towards them.
When Burbury, Connecticut is infected with a strange virus, Xavier must use his healing powers to save the town from an evil computer.
The series' 18th Halloween show features three vignettes that parody movies: one that spoofs "Mr. & Mrs. Smith"; one that sends up "E.T."; and one that parodies "Se7en."
This is the show's first Halloween episode. Edie Britt's biggest fear comes true when Carlos walks out on their relationship. Susan finds Mike's father, who was supposedly dead. Danielle goes into labor right in the middle of the Halloween party... and somebody has to deliver the baby.