As well as writing and acting in the Goon Show, Spike has appeared in several films, stage shows and TV series. He has written a large number of books including poetry, fiction and autobiographies. Notable works include the 'Q' television series, the book 'Puckoon', his war memoirs and the stage show 'Oblomov'.
His groundbreaking achievements in the Goon Show and subsequent work mean that he is considered by many as the grandfather of modern British comedy. He later received a knighthood and CBE.
Spike suffered from Manic Depression for most of his adult life and was hospitalised a number of times during and after the Goon years. The shell shock he suffered during the war and pressure of writing The Goon Show are given as a contributing causes of the condition.
Spike was the last of The Goons to pass on aged 83. He died of liver failure and was buried at St. Thomas's Church in Winchelsea, East Sussex, England. His gravestone bears the Gaelic inscription "Duirt me leat go raibh me breoite", which translates as "I told you I was ill".
Milligan was married three times and had four children. (Laura, Seán and Síle with his first wife June Marlow, one daughter named Jane with his second wife Patricia Milligan and no children with his third wife Shelagh Sinclair).