Investigative Reports - 1991 Crack Doctors 1-29 was released on:
USA: 1 May 1992
It is a crack in time and space, created by the Doctors TARDIS exploding. The crack appears in many places, and removes things from time itself. It can also act as a wormwhole between two places.
Animal Crack-Ups - 1987 Animal Crack-Ups was released on: USA: 28 March 1987
The Crack - 2014 was released on: USA: 27 February 2014 (limited)
A Crack in Everything - 2013 was released on: USA: 29 January 2013
The Crack Promise - 2007 was released on: USA: 1 August 2007
Crack House - 1989 was released on: USA: 10 November 1989
Crack-Up - 1934 was released on: USA: 2 June 1934
Yes, It's bad to crack your fingers at a young age because it can cause arthiritis, a very painful medical condition which can only be treated by doctors' prescription.
Crack Kills - 2001 was released on: USA: December 2001 (Hollywood, California)
Killer Crack - 2010 was released on: USA: 17 March 2010 (Seattle, Washington)
The Crack o' Doom - 1914 was released on: USA: 8 September 1914
A Crack in the Hourglass - 2007 was released on: USA: 10 June 2007 (video premiere)