The Army officer was abducted from a pub in South Armagh in 1977 and murdered.

Captain Nairac moved within the shadowy world of intelligence gathering, and it is believed he was working undercover at the time of his abduction. His remains have never been found.

Now – Gordon Adair’s contact believes he has finally discovered the burial site and he is waiting on confirmation from the Independent Commission for the Location of Victims' Remains, who will visit the site and tell him if they also believe Captain Nairac is buried there. If they do – the Commission will soon move machinery in and dig for the remains.

Recorded across one week, this special edition of Assume Nothing captures in real time what happens as one of the most enduring mysteries of the Troubles appears to be drawing to a close.

Presented by Gordon Adair

Produced by Conor McKay

Editor Andy Martin

A BBC Northern Ireland Production