Accidentally on Purpose S1:E18

Pilot

After breaking up with her commitment-phobic boyfriend, Billie has a fling with a younger guy, ends up pregnant and decides to keep the baby – and the daddy.

Memento

While snooping through Zack's belongings Billie discovers a note addressed to her, that he never finished writing and sets out to find what Zack is hiding.

One Night Stand

Billie's pregnancy makes her more attractive to members of the opposite sex, including Zack, who is turned on by her new curves. However, an unfortunate incident with self tanning lotion, forces Zack to reject Billie's advances toward him.

The Date

Billie and Zack discuss their feelings on dating and agree to see other people, however, Billie's pregnancy gets in the way of any potential love connections.

The Love Guru

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.

Fight Club

Billie and Zack have their first big argument after Zack tries to surprise Billie by installing a low flow toilet.

The Godfather

Billie unintentionally causes Abby and Nick to break up when she asks them to be Godparents. However, after a fun night on the town with Davis goes too far, Billie must stop Abby before she does something she will regret.

The Third Man

When Billie starts dating a colleague from her newspaper, Zack is unable to hide his jealousy.

Working Girl

Billie is threatened when James hires another film critic at the paper and sets out to prove how valuable she is.

Class

When Billie and Zack take instructional parenting classes separately due to their schedules, Billie goes with Olivia and Abby. However, the course quickly becomes a competition when Abby outshines Billie at all the tasks.

It Happened One Christmas

Worried that she'll ruin Christmas – as she has in previous years – Billie tries to hide from her parents the fact that Zack is living with her. Meanwhile, Abby's husband, Nick, tries to impress their father.

The Odd Couples

Abby and Nick have their respective significant others spend time with Billie and Zack to prevent them from finding out about the surprise shower they are planning. However, their plan backfires when both Billie and Zack dislike their new buddies.

The Rock

While working on a story with Sully, Billie gets some surprising news about the newspaper. Meanwhile, Zack and Davis go into the sandwich business together.

Attack of the 50 Foot Woman

Not wanting to sound like a nag, Billie manipulates Zack into doing chores around the apartment; however, her plan backfires when Zack takes the initiative to "decorate" the nursery. Meanwhile, to earn extra cash, Davis gets a job at a gay bar.

Back to School

Billie invites herself to Zack's high school reunion but worries that she can't compete with his hot, ex-girlfriend in her pregnant state. Meanwhile, Olivia helps Abby host a party where they try to sell Abby's miracle youth juice.

Face Off

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.

Speed (1)

Billie pretends to go into labor to save Zack from getting a traffic ticket after they're pulled over for speeding. Meanwhile, Olivia and Davis go shopping for a baby gift.