Tony Leung Ka-fai
Wang Wei / Andy

Sammo Hung Kam-Bo
Liu Hsi-Chia / John

Jackie Chan
Da Chui / Steve

Andy Lau
Iron Ball / Boss Lee

Jimmy Wang Yu
Kui / Lucas

Tou Tsung-Hua
Chu / Charlie

Jack Kao
Lin

Ko Chun-Hsiung
Prison Director

Chang Kuo-Chu
Seng

Elsie Yeh
Yua Fong

Fang Cheng
Prisoner

Chin Ho
Iron Ball's Assistant

Tsao Chien
Fong's Father

Ngai Man-Yin
Police Chief

Tu Fu-Ping
Prison Guard

Yang Hsiung
Lin's Friend

Yu Kam-Po

Yi Yuan
Old Prisoner

Wang An

Chin Wan-Che
(uncredited)

Chu Ben-Ke
Prisoner (uncredited)

Subas Herrero
(uncredited)

Ho Kang
Prisoner (uncredited)

Hu Han-Chang
Prisoner (uncredited)

Hu Tou
Prisoner (uncredited)

Wong Ching-Lam
Prison Guard (uncredited)

Kao Ming
Prisoner (uncredited)

Ku Pao-Ming
Prison Guard in the Kitchen (uncredited)

Kwan Hung
Drug Dealer (uncredited)

Rocky Lai Keung-Ken
Iron Ball's Thug / Prisoner (uncredited)

Ken Lo Wai-Kwong
Bodyguard (uncredited)

Shih Ting-Ken
Prisoner (uncredited)

Tsang Ming-Cheong
Prisoner (uncredited)

Wang Lai
Chu's Grandmother (uncredited)

Wang Yao
(extra) (uncredited)

Yang Lieh
Prisoner (uncredited)

Yeh Ching-Hui
(uncredited)

Teddy Yip Wing-Cho
Prisoner (uncredited)

Yu Sung-Chao
(uncredited)