A Witness Out of the Blue

Louis Koo

Sean Wong

Louis Cheung

Larry Lam

Jessica Hsuan Huen

Joy Ding

Cherry Ngan Cheuk-Ling

Charmaine

Philip Keung Ho-Man

Yip Sau Ching

Fiona Sit Hoi-Kei

Sandy Yeung

Patrick Tam Yiu-Man

Bull Yiu

Andy On Chi-Kit

Tony Ho

Ling Man-Lung

Redhead

Sam Lee

Clark Auyeung

Deep Ng Ho-Hong

Homer Tsui

Annie Liu Xin-You

Ms. Expert

Jacky Cai

Auyeung's girlfriend

Ng Siu-Hin

Handiwork

Aaron Chow

Food Delivery Guy

Evergreen Mak Cheung-Ching

Crab

Tsui Kwong-Lam

Uncle Monk

Soi Cheang

Tony Ho (voice)

Cecilia Chan Lai-Wan

Bull's mother

Deon Cheung Chung-Chi

Undercover