The unit specializes in the investigation of serial murders and is led by Van der Bijl, a former murder and robbery detective who gained fame for his handling of several high-profile cases. Each episode focuses on a serial killer. The main character, Colonel Piet van der Bijl, also known as Die Byl, is loosely modeled on the famous ex-detective Piet Byleveld.

• Waldemar Schultz
• Lika Berning
• Marvin-Lee Beukes
• Milan Murray
• Amalia Uys
• Tyrone Keogh
• Marcel Van Heerden