Step Into the Dark

Sean Lau Ching-wan

Dr. Care Kwan

Athena Chu Yan

Faith Ching

Simon Lui Yu-Yeung

Sperm Loui Kong

Emotion Cheung Kam-Ching

Dr. Leslie Cheung Kwok Ming

Lee Siu-Kay

Care's Hospital Attendant

Soi Cheang

King

Teresa Ha Ping

May May's Mother

Celine Ma Tai-Lo

May May

Joe Ma Tak-Chung

Tinson Kei (uncredited)

Lanna Wong

Thai Medium

Chris Chan Sze-Ting

Faith's Younger Brother (uncredited)

Helena Law Lan

Faith's grandmother