And those are the ones that we know about.
Stanislav Petrov: https://www.youtube.com/watch?v=L7EmLf4Xlq0
Oleg Antonovich Gordievsky: https://www.youtube.com/watch?v=yprpoPc2g0k
Vasili Arkhipov: https://www.youtube.com/watch?v=iLokpu4ixQE
According to some comments "The Collapse Of Communism: The Untold Story" is a movie about Oleg Antonovich Gordievsky and there is a book "The Spy and the Traitor."
And Stanislav Petrov has a movie as well: https://www.youtube.com/watch?v=xTFUqnY3E3Q