'Love is whatever you can still betray. Betrayal can only happen if you love.'

So says Magnus Pym, the spy of the title; and he has betrayed a lot in his life - countries, friends and lovers.

When Magnus disappears after his father's funeral MI6 launches an urgent manhunt to prevent his defection.

John le Carré's spy novel dramatised in three parts by Robert Forrest.

Magnus Pym .... Julian Rhind-Tutt
Jack Brotherhood .... Bill Paterson
Rick Pym .... Michael Maloney
Mary .... Ruth Gemmell
Lippsie .... Melody Grove
Syd Lemon .... Ewan Bailey
Sefton Boyd .... Tom Forrister
Nigel .... Gerard McDermott
Georgie .... Samara MacLaren
Fergus .... Tom Stuart
Peggy Wentworth .... Aoife McMahon
Other parts are played by the cast.

Director: Bruce Young

Made by BBC Scotland for BBC Radio 4 and first broadcast in July 2017. Show less