Andy Lau as Dr. Ko / Derek Hui

Charlie Yeung Choi-Nei as Tse Yuen Sam

Charlene Choi Chuek-Yin as Zi Qing

Anthony Wong Chau-Sang as Dr. Lip

Lam Suet as Ko's Colleague

Andrew Lin Hoi as

Benz Hui Siu-Hung as Zi Qing's Father

Teddy Lin as

Joe Cheung Tung-Cho as

Sasha Hou Sa-Sa as

Gigi Wong as

Lam Pik-Yee as Gallery Colleague

Choi Ming-Wah as Paramedic