Nick Cheung Ka-Fai as Kwok Man Bun / Zero / Kwok Man Shing

Zhang Yishang as May Chou

Patrick Tam Yiu-Man as Wong Sir

Niki Chow Lai-Kei as Lee Wai Lam

Liang Yongqi as Kevin

Sammy Hung Tin-Chiu as Ma Tong Tat

Michael Tong Man-Lung as James

Jiang Shan as Lau Chi Wai

Bao Wenjing as Chor Hei

Du Juan as Director of the Orphanage

Wang Zun as Peter

Lam King-Kong as Lawyer

Li Zhaocai as Collin

Wang Xin as Wang Zhe

Lu Yao as Paw Yu Ming

Andy Lee Diy-Yue as May's Father

Qiao Hua as Siu Wan

Wang Siqin as May Chou's Mother

Ying Xue as Nurse Chan

Wang Qianru as Undead Nurse

Lu Jun as Kwok's Father

Wang Yuan as Kwok's Mother

Liang Jiawei as Police Team A

Tetiana as Police Team A

Dima as Police Team A

Zhou Ming as Police Team A

Wang Ziqiu as Police Team A

Wu Shuwei as Police Team A

Wang Junxi as Young Kevin

Adel as Bodyguard A