HRAJí
- Michael Stone
Self - Forensics Psychologist - Tim Hopper
Self - Narrator - Neil Dudgeon
Self - Narrator - Kris Mohandie
Self - John Cameron
Self - Former Detective - Robert Sciglimpaglia
Dr. Solomon Asche - Tommy Lynn Sells
Self (archive footage) - Arthur Shawcross
Self - Cindy Hendy
Self - Adrian Raine
Self - Austin Trace
Young H.H.Holmes - Catherine Share
Self - Steve Hodel
Self - Ronald Luff
Self - Convicted Cult Member - Tim Carter
Self - Yó
Young Korean Girl - Jessica Schoen
Angela Sanford - Danny Crawford
Hustler - AnnMarie Guidone
Manson Girl - Scott Abbondanzo
Young Martin Bryant (2006-2007) - Pal Aron
Self - Narrator (UK version) - Damian Muziani
John Wayne Gacy - Pat Brown
Self - Criminal Profiler - Helen Fisher
Self - Amanda Boekelheide
Catherine May Wood - Suellen Vance
Theresa Knorr - Stephanie Pryor
Young Susan Smith - Andrew Carpenter
Young Charles Ng (2006)