Old White Dudes

So, I have a friend who used to constantly confuse David Strathairn and Sam Waterston. I can sort of see the similarity, but I'll let you decide:



Personally, I thought these three guys were the same actor: (one of them plays a villain in a TV show I watch, the other just had a bit part... but I was totally like "Ooh, the big demon guy is in this one... I was wrong, nor was it the grumpy old man from like every Primetime drama ever, apparently)



Can you figure out which one is which?