← Previous Next → 1x15 Back to School 2/5 (2 votes) First Aired: Sep. 16, 2010 on CBS Summary: Billie without Zack's knowledge goes to Zack's high school reunion but she is worried that she can't compete with Zack's ex-girlfriend because of her pregnancy. Meanwhile, Olivia helps Abby trow a party to sell Abby's miracle youth juice.

Main Characters in this Episode

• Billie
• Zack
• Olivia
• Abby
• Davis
• James

Guest Stars Ryan played by Pooch Hall Tracy played by Vanessa Lengies Melissa played by Julianna Guill Liz played by Kimberly Kevon Williams Girl #1 played by Janelle Velasquez Girl #2 played by Heather McCallum (II) Donny played by Nick Heyman