Elenco - Hello! Who Is It?
劉青雲
Officer Ma Fai
Anita Lee Yuen-Wah
May Chan
陳龍
Ping's other workmate
Derek Yee Tung-Sing
Supt [cameo]
陳雅倫
Woman in bed [cameo]
陸劍明
Man in bed [cameo]
Hui Pui
Kwai's mistress [as Lam Yi]
Ivy Leung Si-Man
Kwai's wife
何家駒
Linesman Chan Ping