Android Benton and The Doctor in “The Android Invasion”

Hold it, Doctor! [points gun at the Doctor]

Don't be a fool, Benton! I'm one of you!

But--

Didn't you hear the Colonel just now? The Doctor's not here. He's at large somewhere in the complex!

Oh, yes, of course, sir. I'm sorry, sir.

Oh, that's all right, Benton-- but keep your wits about you. Nobody knows who's who around here!