After leaving the army, he starts training at the Secret Intelligence Service when Viktor Koslov (Andrew Scott), a Soviet diplomat, gets him on a case.

[2][3] Paula Milne said: Legacy falls well within the genre of the British spy thriller but has an extraordinary personal twist.

[2] The executive producers are Crawford Collins, Paula Milne and Alan Judd for Slim Film + Television and Lucy Richer for the BBC.

[8] The Independent journalist Gerard Gilbert said: "I guess I'm just not sure that I entirely saw the point of Legacy beyond the fact that the BBC had decided to have a season of programmes about the Cold War.

"[11] Grace Dent of The Independent found the film boring and said "everyone in this Cold War thriller was brilliant, but I still fell asleep".