Park Dietz
— Self - Forensic Psychiatrist
Craig Jackson
— Self - Psychologist
Elizabeth Laugeson
— Self - Psychologist
Claire Hardaker
— Self - Online Hate Expert
Kelly Wang
— Self - George's Mother
Junan Chen
— Self - George's Father
Jinshuang Liu
— Self - David's Mother
Richard Martinez
— Self - Chris's Father
Deb Smith
— Self - Elliot Rodger's Former Principal
Dylan Fontillas
— Self - Witness
Cayla Bergman
— Self - Witness (archive footage)
Sierra Swartz
— Self - Witness (archive footage)
Lucy Briers
— Narrator (voice)
Dan Zargo
— Elliot Rodger (voice)
Audrey Lazzara
— Blonde Yoga Girl (uncredited)