The things they say:

“The most stressful role, the most painful to do was Smiley in Tinker Tailor Soldier Spy. There’s no mask… You have to play boring in an interesting way… He’s plain… I understand why Alec Guinness had a kind of nervous breakdown leading up to the shooting of the original Tinker Tailor and wanted out. I had a breakdown too, briefly.” Gary Oldman struggled with his Oscar-nominated portrayal of George Smiley in the 2011 movie.