The Doctor, Polly Double and others in “The Faceless Ones”

[happy to see Polly] Commandant, this is the girl I was telling you about.

[Polly gives him a puzzled look] I beg your pardon?

Do you know these gentlemen?

No. Why? Should I?

According to them, they know you.

Now where have you been, Polly?

Polly? My name isn't Polly. You must have made a mistake. I've never seen them before in my life!