MI-5

Will Holloway: "People are still dead, Harry."
Harry Pearce: "Far fewer than would have died in the bombings."
Will Holloway: "How do you make a choice like that?"
Harry Pearce: "It's my job."

Will Holloway: "They're nearing position. Anything?"
Malcolm Wynn-Jones: "Not a sausage. The self-perpetuating algorithm I wrote last night is constantly updating, revising all potential vantage points."
Will Holloway: "Sudoku not cutting it then?"

"It's quite telling the fact that the closest thing I have to a friend is someone who thinks I've ruined his life."

Robert Vass: "I spy with my little eye, something beginning with... R. If you can't get it, you do a forfeit."
June Keaton: "Rain?"

Harry Pearce: "Agents like you don't last long in this life."
Will Holloway: "So which ones remain?"
Harry Pearce: "The ones like me..."

"You can do good, or do well."