馮德倫
— H20
張智堯
— Harry / Sammy
李心潔
— Katy Lam
童愛玲
— Supt. Margarita So
王合喜
— Sunny
連凱
— Terrorist Leader
Cyrus Chow
— Jason
Tong Law-Man
— Landon Fu
Chan Yam
— Mr Fu Hang
Wai Gei-Shun
— Asst. Commissioner
雷宇揚
— William Hung
林尚義
— H20's Father
陳曼娜
— H20's Mother
陳芷菁
— Sammy's Sister
韓馬利
— Sammy's Mother
Law Saan
— Sammy's Father
Suet Lam
黃浩然
郭追
唐麗球
Kwok Man-Ki
