"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, on ACCIDENTALLY ON PURPOSE, Monday, Feb. 8 (8:30-9:00 PM, ET/PT) on the CBS Television Network.

SERIES REGULARS:

Billie............................................ Jenna Elfman

Zack............................................... Jon Foster

Olivia......................................... Ashley Jensen

Abby....................................... Lennon Parham

Davis........................................ Nicolas Wright

GUEST CAST:

Ryan............................................... Pooch Hall

Melissa........................................ Julianna Guill

Tracy..................................... Vanessa Lengies

Liz............................ Kimberly Kevon Williams

Girl #1.................................. Janelle Velasquez

Girl #2................................ Heather McCallum

Donny........................................ Nick Heyman

WRITTEN BY:  Franklin Hardy & Shane Kosakowski

DIRECTED BY:  David Trainer

GENRE:  COMEDY

RATING:  TVPG-DLS

Photos now available at http://www.cbspressexpress.com/

On the Web: http://www.cbs.com/primetime/accidentally_on_purpose/