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Follow Billie, a girl who recently found herself single after realizing that what she and her former boyfriend want out of life are two separate things. After the breakup, she decides to go out with some friends to relax, only to end up having a one night stand and becoming pregnant.

After moving Zack the baby's father in as just friends. Billie is left wondering what is going to happen. Between advice from her friends and, Zack is always having friends over, making her wonder if she has made the right decision. Maybe their living together is going to be like having another child to raise.

Monday 8:30 PM et/pt on CBS
1 Season, 18 Episodes
September 21, 2009
Cast: Jenna Elfman, Jon Foster, Ashley Jensen, Lennon Parham
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Accidentally on Purpose Full Episode Guide

  • After faking labor pains, Billie gets them for real. Unfurtunately, Zack gets busted by the first cop they lied to and he is sent to the police station.

  • In the first part of a two-parter, Billie acts as if she gets into labor in order to save Zack from a traffic ticket of speeding. Meanwhile, Olivia and Davis spend the day shopping for a baby gift.

  • Zack is upset when Billie hires a baby nurse without consulting him. Meanwhile, Davis and Ryan are faced with a difficult choice when they learn surprising news about the nurse.

  • Billie invites herself to Zack's high school reunion, but with regrets when she becomes unsure if she can't compete with Zack's hot ex-girlfriend in her pregnant state. Meanwhile, Abby makes a miracle youth juice that she tries to sell at a party that she and Olivia host.

  • Billie tries to manipulate Zack so he does more chores around the apartement, but her plan backfires when Zack ends up decorating the nursery instead. Menawhile, Davis gets a job at a gay bar to earn extra cash.

  • While working on an article with Sully, Billie comes across some shocking news about the newspaper. Meanwhile, Zack and Davis decide to go into the sandwich business.

  • As they prepare for a surprise shower, Nick and Abby set up their significant others to keep Billie and Zack occupied. The plan turns into a disaster when the arranged couples don't get along.

  • Billie and Zack begin taking instructional parenting classes, but separately due to their busy schedules. However, Billie decides to go with Olivia and Abby, but when Abby starts to outshine Billie at all the tasks, the course turns into a competition.

  • After James employs a new movie critic for the newspaper, Billie sees her job in peril and starts showing her value to her boss.

  • Zack becomes jealous when Billie starts dating a colleague from her work at the newspaper.

  • Without meaning to, Billie causes the breakup of Abby and her husband after she asks her and Davis to be the godparents of her child. Billie has to prevent her sister from making any more mistakes during a night out with Davis.

  • Zack's plan to surprise Billie with a newly-installed low flow toilet leads to an unpleasant outcome as he and Billie get into their first major squabble.

  • Billie tries to live vicariously through Zack and Davis by offering up dating advice to them. However, things take a turn, when the objects of the boys' affection reveal their true intentions.

  • Billie and Zack agree to see other people. However, this proves to be easier said than done when Billie's pregnancy gets in the way of both of their potential dates.

  • Billie's pregnancy makes her more attractive to members of the opposite sex, including Zack, who is turned on by her new curves.

  • After breaking it off with her boyfriend, Billie has a one-night-stand with a younger guy. After ending up pregnant, Billie decides to keep the baby, as well as the father.

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