Feeling guilty over the stabbing, Charlie puts his attention on finding a serial killer using math theories to help the team solve the case before another life is taken.

The team have to find out the identity of a killer of an unarmed man as they attempt to clear their detective’s name.

Lilly pride takes a hit when she’s forced to wear her awful looking glasses right before a skateboarding contest. Hoping to help, Miley convinces her friend not worry about her…

Miley, Lilly, and Oliver are just itching to get revenge on bratty Amber & Ashley during a class camping trip, even though Robbie told Miley not sink to their level….

When a teenaged boy whose family has recently fallen on hard times is found dead in a boat in Central Park, Castle and Beckett must piece together the mystery behind…

In this Halloween episode Chuck meets a Federal agent just like him: A computer whiz whose brain is important to national security. However, Chuck soon has a personal dilemma arise…

After his intuition is wrong while working on a stakeout, Chuck feels morally obligated to make things right, even when both Sarah and Casey refuse to help with Chuck’s new…

Veronica begins college with Logan, Wallace and Mac, but is immediately drawn back into old detective habits when Piz, Wallace’s new roommate, gets all his stuff stolen. Meanwhile, Keith helps…

Sheldon and Amy host a live Valentine’s Day episode of Fun with Flags, Leonard and Penny grapple with getting older, Howard and Bernadette find a surprise in their hot tub…