The Second Floor Mystery - 1930 was released on:
USA: 26 April 1930
Netherlands: 5 June 1931
USA: September 2005 (Cinecon Film Festival)
Symphony in Two Flats - 1930 was released on:
UK: 16 July 1930 (London)
USA: 30 July 1930 (premiere)
USA: 1 December 1930
Forests of Mystery - 2009 was released on: USA: September 2009
The Marionette Mystery - 1950 TV was released on: USA: 1950
A Toyland Mystery - 1916 was released on: USA: 23 March 1916
The Mystery of the Milk - 1914 was released on: USA: 5 January 1914
Four on the Floor - 1994 was released on: USA: 1994
Dateline Mystery - 2009 Second Chances The King Brothers 1-4 was released on: USA: 7 September 2009
Mystery - 1980 The Return of Sherlock Holmes I The Second Stain 7-15 was released on: USA: 26 February 1987
American Builder - 2004 Constantine The Second Floor 1-36 was released on: USA: 18 May 2005
The Mystery - 1912 was released on: USA: 9 March 1912
Mystery Mansion - 1983 was released on: USA: 1983
An American Mystery - 2015 was released on: USA: 2015
Mystery - 1980 was released on: USA: 5 February 1980
Forests of Mystery - 2009 was released on: USA: September 2009
A Chinese Mystery - 1902 was released on: USA: May 1902
Mystery Pilot - 1926 was released on: USA: May 1926
The Chamber Mystery - 1920 was released on: USA: March 1920
The Woman of Mystery - 1920 was released on: USA: August 1920