Down the Call-Sheet: Fred Ochs in 'The Stanford Prison Experiment'
One of the pleasures of working in an industry of illusion is the feeling of surprise you get when a particular known actor sneaks by you on-screen in plain view and you didn't even realize it. The camera was on them, they spoke and you simply accepted that person in the circumstances without some inner alert as to who they really are. Sometimes that realization comes in the credits when you read their name in the scroll and go "who were they?" and scramble to open your imdb