Yes, Minister, Series Three (1982)

Bernard:
[on the phone] Hello, Graham, it's Bernard. Tell Sir Humphrey that the Minister's just gone walkabout. Yes, yes, AWOL. Well, of course I told him, yes. I know. I think you'd better let him know right away.

[hangs up]

Bernard:
One... two... three... four... five... six... seven... eight... nine... TEN.

Sir Humphrey:
[walks in on the stroke of ten] What's all this about?

Bernard:
The minister's just left the office, that's all.

Sir Humphrey:
That's all? Do you mean he's loose in the building? Why didn't you warn me?

Bernard:
I did advise him, but he is the minister. There's no prohibition against ministers talking to their staff.

Sir Humphrey:
Who's he talking to?

Bernard:
Perhaps he was just restless.

Sir Humphrey:
If the minister's restless, he can feed the ducks in St James's Park!

Bernard:
Yes, Sir Humphrey.

Sir Humphrey:
Tell me who the minister's talking to.

Bernard:
Well, surely the minister can talk to anyone?

Sir Humphrey:
Bernard... I'm in the middle of writing your annual report. Now, it is not a responsibility that either of us would wish me to discharge whilst I am in a bad temper. Who's the minister talking to?

Bernard:
Perhaps you could help me. I can see that you should know if he calls on an outsider. I fail to see why you should be informed if he just wants to, to take a hypothetical example, to check a point with... Dr Cartwright...

Sir Humphrey:
Thank you, Bernard. Must fly.

Bernard:
Room 4017.

Sir Humphrey:
I know!