Alister George Douglas Watson
(born 2 May 1908
, died 1981 in Haslemere
) was a mathematician
who was identified by several writers as a key member of the Cambridge spy ring
He attended Winchester School and studied mathematics at Kings College, Cambridge, where he was appointed as a fellow.
Life at Cambridge
At Cambridge, he joined the Communist Party of Great Britain as well as being a member of the Cambridge Apostles. In the summer of 1937, he introduced Ludwig Wittgenstein to Alan Turing. He was also well acquainted with John Maynard Keynes and other leading figures of the Cambridge academic life of the time.