Quiller is the alias of a fictional spy created by English novelist Elleston Trevor who featured in a series of Cold War thrillers written under the pseudonym "Adam Hall".
Although all episodes survived destruction, the series has never been repeated on the BBC or other channels since its original transmission nor is it currently available online, on Blu-ray or DVD[1] but in 2022 surfaced on YouTube and Telegram.
This organisation dispatches Quiller on various missions across the globe to retrieve missing documentation, prevent secrets from falling into the hands of the enemy, rescue "sleepers", safely repatriate defecting agents or eliminate those whom Her Majesty's Government wishes to disappear.
His controller at "The Bureau" is Angus Kinloch (Moray Watson) and the only other series regular is Rosalind (Sinéad Cusack).
The series adhered to the typical format of BBC dramas from that era, using 16mm film for outdoor locations and studio videotape for interior scenes.