Accidentally on Purpose (CBS) Premiere: Monday, Sept. 21, 8:30-9 p.m. Time-Slot Competition: Dancing with the Stars , House , Heroes , One Tree Hill Cast: Jenna Elfman, Ashley Jensen, Jon Foster, Grant Show, Lennon Parham, Nicolas Wright Status: We'v more

Billie and Zack, in considering his proposal, want to see if their relationship can work outside their apartment. Abby plans their co-ed babyshower. They hang out with Nick and Abby, but offend Abby when sharing Zack's perceptions of Nick, so she can more

Billie hosts Christmas for her family and parents, but she has not told them that Zack lives there wither her and tries to keep it a secret. Abby's husband Nick tries to impress their father, with little success. Davis and Zack leave on their holiday more

Billie and Zack are sent to instructional parenting classes by Dr. Roland, both hesitant to go out of fear they can not handle a baby. Both attend separately due to their schedules, Zack with his buddy, Davis and Billie with her gal-pal, Olivia. Zack and more

When the baby expenses start adding up for Zack he decides to ask his boss if he can be sous chef for a night. Great cooking and an accident with a co-worker in the kitchen lands Zack the position even sooner than he thought. At work, Billie finds out tha more

Brian and Billie are really hitting it off but an awkward moment strikes when Zack walks in on the two kissing. There's something about Brian that Zack doesn't like but he decides that if Brian is going to be a part of his baby's life, he s more

When Billie asks Abby and Nick to be the baby's Godparents, their strange response indicates a problem, which turns out to be that Abby wants to start a family and Nick is non-committal. Billie urges Abby to push Nick for an answer, which backfires, more

The topic of dating is broached when Billie gets picked up while out with Abby and Olivia. With Billie and Zack having decided to keep their relationship platonic, they discuss their feelings on dating and conclude that they are both fine to see other peo more