I probably first saw David Costabile in the first season of Damages, where he plays, as I’ve read some people put it, the most corrupt cop ever. I noticed him again in the fifth season of The Wire,1 where he looked nothing like he had on Damages. In The Wire he was a clean-shaven and oily character; in Damages he wore a large pair of thick-rimmed glasses and covered his face with a scruffy salt-and-pepper beard. Also: the most corrupt cop ever.
And of course, Costabile portrayed poor, poor Gale Boetticher in Breaking Bad, and now everyone has seen him somewhere (even though they probably already had before). The video above is only one instance of his amazing acting, or at least boldness.