I recently came across these quantum field theory lectures by Professor Sidney Coleman and am putting together a nice set of notes for them. I encourage everyone to watch these lectures if they're interested in the subject. The lectures are from 1975 to 1976, and the video quality wouldn't meet today's standard, but the content is rich. Also, seeing Prof. Coleman smoking a cigarette during his lecture will serve as nostalgia to some and wonderment to others that smoking in classrooms ever existed.