Daniel Day-Lewis?!!
When Glenda Jackson takes a call from Walter Matthau in the tea-shop (he's calling from London) and we don't actually hear the conversation but see her, through the glass panes in the door, speaking on the phone, there is someone outside watching her (presumably yet another CIA spook); he is only shown for a few moments, and he doesn't say, or even subsequently do, anything, but it looked very like a young Daniel Day-Lewis! No mention of him, even as an uncredited. Anyone else spot this, or know if it was him?