The Secret History of Eurovision - 2011 TV is rated/received certificates of:
Australia:PG
Immigration Nation The Secret History of Us - 2011 is rated/received certificates of: Australia:PG
Nazi America A Secret History - 2000 TV is rated/received certificates of: USA:TV-PG
The Ku Klux Klan A Secret History - 1998 TV is rated/received certificates of: Singapore:PG
Virtual History The Secret Plot to Kill Hitler - 2004 TV is rated/received certificates of: Finland:K-3
Immigration Nation The Secret History of Us - 2011 One 1-1 is rated/received certificates of: Australia:PG
In Secret - 2013 is rated/received certificates of: USA:R
The Secret - 2011 I is rated/received certificates of: UK:12
Secret - 2009 I is rated/received certificates of: UK:15
Family Secret - 2001 is rated/received certificates of: USA:PG
The Secret Voice - 1936 is rated/received certificates of: UK:A
What We Do Is Secret - 2007 is rated/received certificates of: Germany:16 USA:R
The Secret of the Loch - 1934 is rated/received certificates of: UK:U