Roger can't hide a smirk in this still from the Mad Men episode "Waldorf Stories." You gotta love the interactions between him and Don.
Added:
A trio of our Mad Men favorites are pictured here. Don, Joan and Roger are spotted in the episode "Waldorf Stories."
Added:

Mad Men Season 4 Episode 6 Quotes

Don: Do you got anything on Vicl's?
Peggy: Actually it's Vick. Vick Chemical.
Don: Answer the question.

Danny: You know what they say: aspiration's as good as perspiration.
Don: That's not how it goes.