James Garrett

Narrator (voice)

David Canter

Self - Criminal Psychologist

Joseph Kozenczak

Self (as Det. Joe Kozenczak)

Howard Markel

Self - Medical Historian

Liz Spikol

Self - Philadelphia Weekly

Beth Pitezel

Self - Grandaughter of Victim

Brenda Pitezel

Self - Grandaughter of Victim

H.H. Holmes

Self (archive sound)