What do I do in Klingmann's office?

Hint 1 of 8:

Not much, actually.

Hint 2 of 8:

Did you talk to him?

Hint 3 of 8:

He won't take you to see the wolves either, huh?

Hint 4 of 8:

Did you notice the walky-talky on his desk?

Hint 5 of 8:

If you could convince Thomas that you were "Herr Doktor Klingmann", maybe you
could get in to see the zoo wolves.