Tzi Ma
Yellowthread Street is a British television police drama, first broadcast in 1990, that focuses on the work of a group of detectives in the Royal Hong Kong Police. Developed and produced by Ranald Graham, the series was loosely based on the novels by William Leonard Marshall. A single season of thirteen episodes was produced by Yorkshire Television and broadcast on ITV from January 13 to April 7, 1990. The series starred Ray Lonnen as principal character Alex Vale, with Bruce Payne, Robert Taylor, Doreen Chan, Tzi Ma, Mark McGann and Catherine Neilson also appearing as detectives in the series.