Robertson made his debut in the 1955 film 'Picnic,' starring William Holden and Kim Novak.
He played a man out for revenge in Sam Fuller's crime drama 'Underworld USA' (1961).
He was hand-chosen by John F. Kennedy in 1962 to star in 'PT 109,' based on the President's exploits in World War II.
A scene from his Oscar-winning role in 'Charly,' based on the book 'Flowers for Algernon.'
As the bad guy in the thriller 'Three Days of the Condor,' opposite Robert Redford.
As Peter Parker's beloved Uncle Ben in 'Spider-Man' (2002).
image courtesy of AP