Zhao Wei as Dr. Tong Qian

Louis Koo as Ken (Chief Inspector)

Wallace Chung as Shun (Gangster)

Lo Hoi-Pang as Chung (Patient)

Eddie Cheung Siu-Fai as Dr. Fok

Lam Suet as Fatty (Constable)

Mimi Kung as Advance Practice Nurse

Timmy Hung Tin-Ming as Chak (Patient)

Michael Tse Tin-Wah as Gangster

Raymond Ho-Yin Wong as Gangster

Vincent Sze Cho-Lam as Gangster

Jonathan Wong Chi-Hin as Hung (Patient)

Stephen Au Kam-Tong as Tong (Sergent)

Mickey Chu Kin-Kwan as Dr. Steven Chow

Hedi He Guoxuan as Yeung (Constable)

Cheung Kwok-Keung as Mr. Ng (Patient)

Helen Tam Yuk-Ying as Mrs. Ng (Visitor)

Chim Bing-Hei as Lee (Senior Inspector)

Ng Wah-Shan as Wan (Constable)

Luvin Ho as Ho (Senior Inspector)

Sire Ma as Journalist

Antonio Sek Chi-Ho as Dr. Shek (A&E Consultant)

Pancy Chan as Nurse

Tsui Ho-Cheong as Uniformed Officer

Raymond Chiu as Anesthesiologist

Mason Chiu as Dr. Alex Tsang

Zhang Yaodong as Neurosurgery Resident

Ka Chak-Lun as Physiotherapist

Ben Yeung as Radiologist

Chow Tsz-Lung as Radiographer

Miu Tse Yin-Ki as Neurosurgery Resident

Donovan Chan as Neurosurgery Resident

Margiela Kwok as ICU Resident

Leung Ho-Bong as Orthopedics

James Kazama as A&E Resident

Nick Chong Siu-Lun as Houseman

Zheng Jiaping as Houseman

Pu Chunyan as Houseman

Lau Kei as Houseman

Adrian Wong Tsz-Ching as Nurse

Tina Shek as Nurse

Kathy Wu as Nurse

Rosella Lau as Nurse

Chu Wing-Ka as Nurse

Soraya Chau as Nurse

Shen Wei as Nurse

Liu Wenwen as Nurse

Winnie Shum Wing-Ting as Nurse

Vivian Xu as Nurse

Yu Cai-Lin as Nurse

Ivy Lau Ting-Kwan as Nurse

Ivy Pang as Advance Practice Nurse

Yuri Wong Chung-Ming as A&E Nurse

Nancy Zhou as A&E Nurse

Gigi Wong Pui-Chi as A&E Nurse

Bryant Mak as CID

Aaron Chow as CID

Kevin Chu as CID

Wong Chun-Him as CID

Ronald Lam Tsz-Kit as CID

Lo King-Shing as CID

Eunice Ho Wing-Man as Journalist

Leung Han-Yuan as Journalist

He Yu-Wei as Vegetable (Patient)

La Ying as Patient

Jacky Lo as Patient

Yang Wen-Fei as Patient

An Xiaolong as Patient

Zhou Gong-Rong as Patient

Lin Yu-Shu as Patient

Ceng Kang as Patient

Zhou Zhenhua as Patient

Wu Dong as Patient

Tian Qinghe as Visitor

Huang Wei-Qian as Visitor

Xu Wencong as Visitor

Li Junhua as Visitor

Chen Xue as Visitor

Luo Hong-Li as Visitor

Wang Yi as Ward Assistant

Lin Li-Zhen as Ward Assistant

Liu Jinhan as Wardsman

Rong Hao-Dong as Security Guard

Liu Dong-Jun as Security Guard

Zhong Xiu-Lan as Cleaner

Angus Chan Siu-Hei as Sun (Constable)

Zhao Yiyi as Dr. Tong Qian (voice)

Johnnie To as Wong Superintendent (voice)