A Witness Out of the Blue— Full Cast

Louis Koo

as Sean Wong

Louis Cheung

as Larry Lam

Jessica Hsuan

as Joy Ding

Cherry Ngan Cheuk-Ling

as Charmaine

Philip Keung Ho-Man

as Yip Sau Ching

Fiona Sit Hoi-Kei

as Sandy Yeung

Patrick Tam Yiu-Man

as Bull Yiu

Andy On Chi-Kit

as Tony Ho

Ling Man-Lung

as Redhead

Sam Lee

as Clark Auyeung

Deep Ng Ho-Hong

as Homer Tsui

Annie Liu Xin-You

as Ms. Expert

Jacky Cai

as Auyeung's girlfriend

Ng Siu-Hin

as Handiwork

Aaron Chow

as Food Delivery Guy