Gordon Corera reveals evidence of a secret deal between a code-machine company and the NSA
Dominic Streatfeild investigates the case of Argentine POW Alfredo Astiz in 1982.
Sanchia Berg rediscovers the lost trail of the MI5 spy who was left out in the cold.
Sarah Richardson discovers a document which shows that women in Lichfield voted in 1843.
Heather Jones explores a lost intelligence report warning of Germany's invasion of Poland.
David Loyn investigates how a lost record is helping Afghanistan address its painful past.
Gordon Corera travels to Stockholm to investigate the assassination of a prime minister.
Using new documents, Mike Thomson investigates a largely forgotten massacre in India.
Mike Thomson explores a document pointing at American treachery prior to Pearl Harbour.
Mike Thomson examines documents revealing British brutality in Kenya in the 1950s.