Henry Cavill: August Walker
August Walker : How many times has Hunt's government betrayed him, disavowed him, cast him aside? How long before a man like that has had enough?
August Walker : [to Lane] Why do you have to make things so fucking complicated?
Luther Stickell : [to Hunt about Walker] He's not just some observer. He's an assassin.
Ethan Hunt : [to his team] Don't trust anybody outside of this room.
Alan Hunley : You go rogue, he's been authorized to hunt you down and kill you.
August Walker : That's the job.
[sends in his troops]
August Walker : No hard feelings.
August Walker : [to Ethan, while hanging off the wreckage of a helicopter] Why won't you just die?