Devin Crittenden

Hotchner and the team look into a spree of killings in a small Texas town, and race to find out what happened to a teenage boy and his girlfriend.

The discovery of a disembodied human brain at the scene of a car crash gives the CSI team a few headaches: it does not belong to any of the victims. Whose brain was it, and what is it doing by the roadside? DB Russell is also concerned his son is not focused on college following his suspension from school.

Kevin and Jenny are hard at work searching for the perfect paint colour, Sofia accuses Ruxin of breast favouritism, and Pete attempts to defend his track record from high school.

A violent stalker targets a childhood friend of Tariq's, as Tanner grows desperate while trying to locate a key witness in Mia's murder case.