For detective dramas, however, we relied on the plot and music to create the suspense that appealed to listeners. The early Rediffusion drama “The Cases of Detective Kwok Lam” was very popular. So was “The Cases of Detective Wai Lun” produced by Radio Hong Kong in the ‘60s. When this play was aired, it would come to a stop five minutes before the programme was due to end. Listeners were invited to call in and guess the identity of the murderer, and a cash prize was offered for the right answer. Then during the last few minutes, the murderer’s identity would be revealed, and the audience would be told how the crime was solved.