The Knock

The Knock
(L to R: The show's main cast in Series Two — Marston Bloom, Enzo Squillino Jr., Steve Toussaint, Caroline Lee Johnson, Malcolm Storry, Alex Kingston, Andrew Dunn and Tracey Whitwell.)
Genre	Crime drama
Created by	Anita Bronson
Written by	Anita Bronson Geoffrey Case Ian Kennedy Martin Steve Trafford Stephen Leather
Directed by	Various
Starring	Caroline Lee-Johnson Steve Toussaint Enzo Squillino, Jr. Malcolm Storry Marston Bloom Andrew Dunn Mark Lewis Jones Peter O'Brien Alex Kingston Tracey Whitwell Daniel O'Grady Daniel Brown Sarah Malin Jonathan Kerrigan Michelle Morris Zig Byfield
Ending theme	"The Knock"
Composers	Brian Bennett Warren Bennett
Country of origin	United Kingdom
Original language	English
No. of series	5
No. of episodes	37 (list of episodes) Preview warning: Page using Template:Infobox television with "list_episodes" parameter using self-link. See Infobox instructions and MOS:INFOBOXPURPOSE.
Production
Executive producer	Paul Knight
Producer	Phillip Leach
Production location	United Kingdom
Editor	Nigel Parkes
Running time	75 minutes (w/advertisements) (Series 1-4) 105 minutes (w/advertisements) (Series 5)
Production company	Bronson/Knight Productions for LWT
Original release
Network	ITV
Release	10 April 1994 (1994-04-10) – 11 November 2000 (2000-11-11)
Infobox instructions (only shown in preview)

The Knock is a British television crime drama, created by Anita Bronson and broadcast on ITV, which portrayed the activities of customs officers from the London City & South Collection Investigation Unit of HM Customs and Excise.^[1] The series derived its name from the distinctive "Knock knock knock" command used over the radio to synchronise a raid.

Five series were broadcast from 10 April 1994, until 11 November 2000. 37 episodes were made. The series had a rotating cast, with only a small number of cast members appearing throughout the series' run. The only three cast members to appear in every series were Caroline Lee-Johnson, Trevor Byfield and Steve Toussaint. The series also adopted a number of different formats: while the early series interspersed various storylines and had running plots across the series; later series adopted a multi-part format resulting in two or three cases per series; while the final series adopted a stand-alone week by-week format.

The series was axed in 2001 following poor viewing figures for the final series. This was blamed on the loss of several main cast members, a change in the format and the overall look of the series which changed dramatically following an overhaul by ITV executives in 1999.^[2]