The Trap-Door Clue - 1914 was released on:
USA: 9 June 1914
No Clue - 2011 was released on: USA: August 2011
Clue - 2011 was released on: USA: 14 November 2011
The Clue - 1915 was released on: USA: 8 July 1915
The Right Clue - 1912 was released on: USA: 2 March 1912
The Pencil Clue - 1916 was released on: USA: 3 November 1916
A Clue to Her Parentage - 1912 was released on: USA: 27 December 1912
The False Clue - 1916 was released on: USA: 20 November 1916
The Missing Clue - 1915 was released on: USA: 28 July 1915
Clue Club - 1976 was released on: USA: 14 August 1976
The Clue - 1913 II was released on: USA: 30 October 1913
An Accidental Clue - 1913 was released on: USA: 29 November 1913
The Perfect Clue - 1935 was released on: USA: 13 March 1935