Keith and Lucas' car collides with an oncoming vehicle. Dan races Lucas to the hospital, where he must acknowledge Lucas is his son to save his life.
Taylor ruins Seth's night when she throws a Harbour School event that keeps Summer at a distance, and Marissa's new friendship at the public school worries Summer so she enlists Ryan's help.
When a man is found dead in a trash container on Thanksgiving night, Grissom and the team look to what the man ate for the cause of death.
Johnny struggles over a friend's happiness, and Sandy must make a difficult decision.
Matt, Sandy's Newport Group partner, goes above and beyond the call of duty.