Mycroft Holmes: We need to find that mole,Mr.Smiley. I have the perfect man who can help you. He can be a bit brass,stubborn,and very sarcastic. But,he can get the job done.
George Smiley: How do I know if he is any good?
Mycroft Holmes: I have to admit..he’s young. He doesn’t know anything about being an agent. But he is very good. He’ll find your mole. Sherlock?
George Smiley: Hello.
Sherlock Holmes: I’ll take your case.