Ronobir Lahiri

The 118 race to the rescues with emergencies at a spin class; in a hair salon and to a husband and wife in a compromising position; Buck discovers new cognitive abilities post lightning strike; Hen and Karen are concerned when they find out Denny has been seeing his biological father behind their backs; Maddie and Chimney enlist Athena and Bobby’s help with a suspicious neighbor.

When a shocked teenager finds a dismembered body laying in pieces in a strange purple pool of water, Brennan and Booth come to the scene only to find the victim's head is missing. With help from Brennan's newest grad student, Wendell, the team discovers the body is that of Jared Addison, a 25-year-old science fiction writer who suffers from OCD and a crippling fear of germs. With Sweets' psychological insight into Jared's perfectly regimented world, Booth and Brennan track down a number of suspects including Jared's psychologist, his much older girlfriend and his science-fiction book publisher, all of whom have good reason to want Jared out of their lives. However, without the victim's head, the team struggles to find enough evidence to locate a killer - that is, until they receive insight from Zack, who studies the case from afar at his psychiatric facility with case information provided to him by Hodgins. Meanwhile, Brennan scolds Booth for not letting her ever fend for herself.

When a body is discovered in Atlanta covered in scratches, the BAU finds that this death and subsequent murders could be linked to an UnSub with an obsessive skin disorder.

The race for the Chief's position is on, as the doctors compete for Richard's affections, a surgical patient endangers the lives of those around her, and Meredith's Alzheimer's-stricken mother, Ellis, experiences a change in her medical condition.

While Alan and Jake are away on a road trip, Charlie is visited by the ghosts of his ex-girlfriends.