Marcus T. Thomas

When two guards at a privatized maximum security prison in Texas are murdered, the BAU suspects that more than one UnSub within the prison could be at work.

Randall and William take a road trip to Memphis, where Randall learns about his biological father's past.

When a policeman kills another officer, the CSIs must look to the evidence to determine if the shooting was premeditated or an accident. Infighting between the police and the local community soon ensues in this racially charged case. (TV-14)

When Christy falls back into old habits, Bonnie worries about her well-being in the fifth season finale.