David Barrera

Leonard and Sheldon (series stars JOHNNY GALECKI and JIM PARSONS) are brilliant physicists – geniuses in the laboratory, but socially challenged everywhere else. Enter beautiful, street-smart neighbor, Penny (series star KALEY CUOCO-SWEETING), who aims to teach them a thing or two about life. Despite their on-again, off-again relationship in the past, Leonard and Penny have finally gotten engaged. Even Sheldon has found a female companion – entering into a “Relationship Agreement” with neurobiologist Amy Farrah Fowler (series star MAYIM BIALIK). In their free time, Leonard and Sheldon enjoy fantasy role-playing games with their ever-expanding universe of friends, including fellow scientists Raj (series star KUNAL NAYYAR) and Howard (series star SIMON HELBERG), and Howard's adorable microbiologist wife, Bernadette (series star MELISSA RAUCH).

When a member of Cho's former gang, the Avon Park Playboys, is found murdered, Patrick Jane insists on helping Cho with his personal, off-the-books investigation.

When Christy is promoted to manager of the restaurant, she is faced with new problems; Bonnie encounters a nemesis.

Despite the enthusiastic anticipation of the city's residents for Halloween, a series of horrifying child abductions make their way to Portland, quickly spoiling the holiday spirit. Nick and Hank join forces with Valentina Espinosa, a mysterious detective from Albuquerque, to help find and capture the elusive suspect. Meanwhile, Monroe celebrates the holiday in fine style as he teaches the neighborhood bullies a lesson.

Topher is injured in a shootout with Milo; T.C. struggles to keep his flashbacks under control; Jordan is forced to treat Milo; an explosion at a fertilizer factory sends many burn victims to the emergency room.