Mark Berry

The team hunts a suspect who impregnates young women and has them give birth before murdering them.

Sheldon goes to Las Vegas in an attempt to win money for science. Penny and Bernadette take Amy shopping for a wedding dress.

Jennifer Beals returns as Cal's acerbic ex-wife, and Zoe needs the expert's help in the case of a college football star accused of statutory rape.

Mickey spends time with Bunchy and Terry, Ray obtains a hip-hop artist for his rapping neighbour, Ezra holds a fundraiser, and Mickey is approached by an FBI agent.

Leslie and Ben start new some interesting new jobs. Meanwhile, Donna, April and Andy prank Ben. Also, Tom readies himself for a big presentation and Ann and Chris consider the future.

After a petty officer is found murdered, McGee spends hours on the victim's ham radio trying to locate a key witness.