Saturday night's '48 Hours' with back-to-back episodes

48 HOURS on CBS. The Dog Days of Summer continues and two back-to-back episodes every Saturday night. The first segment was called, "The Dexter Killer."

CBS. 

48 HOURS on CBS. The Dog Days of Summer continues and two back-to-back episodes every Saturday night. The second segment was called, "The Snapchat Clue."

CBS.