I'm only familiar with the newWho, but I think I'll see if I can Netflix some of the older stuff he was in.What is the title quote from?
It's from 'Battlefield', a 7th Doctor episode that just happens to be my all time favorite Who episode. It also is the Brigadier's swan song on the show. When The Brigadier faces off against the Destroyer, we get this exchange:The Destroyer: "Ah... little man. What do you want of me?" Brigadier: "Get off my world!" The Destroyer: "Pitiful. Can this world do no better than you as their champion?" Brigadier: "Probably. I just do the best I can."
http://www.youtube.com/watch?v=SPNg9Y48EEgThe sequence I'm referring to starts around 3:00 and runs through to about 5:00.