Knock - 1951 was released on:
France: 21 March 1951
Sweden: 13 August 1951
USA: 8 October 1955 (New York City, New York)
Knock Knock - 2013 was released on: USA: 30 December 2013
The Challenge - 1951 was released on: USA: 1951
How To - 1951 was released on: USA: 10 July 1951
The Knock Out - 1921 was released on: USA: October 1921
Knock Knock - 2008 was released on: USA: 19 April 2008 (Salem Film Festival)
Knock Out - 1998 - TV was released on: USA: 1998
Knock Out - 1998 TV was released on: USA: 1998
Knock Out - 1975 VG was released on: USA: 1975
Knock Knock - 1940 was released on: USA: 25 November 1940 Denmark: 30 November 1953
AMC - 1951 was released on: USA: 25 April 1951
The Hoodlum - 1951 was released on: USA: 5 July 1951
Deal Me In - 1951 was released on: USA: 3 August 1951