Aired: 10/11/2009
The sixth season begins with Hef's new girlfriends Crystal Harris and twins Karissa and Kristina Shannon. The sisters travel to Las Vegas to celebrate their double Playmate issue.
Aired: 10/18/2009
Hef and Crystal go to Las Vegas to join the twins. Later, they go to see Holly in a live show.
Aired: 10/25/2009
Crystal, Karissa and Kristina get into trouble on a Hollywood tour bus and fear they may be arrested.
Aired: 11/1/2009
The twins and Crystal camp in the backyard at the mansion with some friends, but end up in Hef's room to watch a movie.
Aired: 11/8/2009
Karissa and Kristina prepare for roles as sexy twins in Sofia Coppola's movie "Somewhere." Meanwhile, Crystal learns she will be a Playmate and poses for her photo shoot.
Aired: 11/15/2009
Hef attends a music festival in Italy and takes the twins and Crystal along to share the fun.
Aired: 11/22/2009
Bridget Marquardt hosts a fashion show to benefit an animal charity and gets Crystal and the twins to help out.
Aired: 11/29/2009
A film shoot for a video game takes place at the mansion. Also: Crystal takes singing lessons.
Aired: 12/6/2009
Holly, Bridget, Crystal and the twins throw a baby shower for Kendra.
Hef and Crystal celebrate their first anniversary of being together.
Aired: 8/8/2010
