Win Some, Lose Some
10th April 1994Love and Respect
17th April 1994Trouble in Chinatown
24th April 1994Endangered Species
1st May 1994Reason for Concern
8th May 1994Show Your Metal
15th May 1994Hold Me Close
22nd May 1994The Knock is a British television drama series, created by Anita Bronson and broadcast on ITV from 1994 to 2000, which portrayed the activities of customs officers from Her Majesty's Customs and Excise. The series derived its name from the distinctive 'knock knock knock' command used over the radio to synchronise a raid.