'Initially, yes,' said Bernard. 'But then it livened up immensely as he became more and more indiscreet.'
I could hardly believe my ears. 'Humphrey? Indiscreet? On the air?'
'Well, he thought the broadcast was over, so he was just chatting. Unofficially. But the tape was still running.'
I began to have a sinking feeling in my stomach. And my heart was literally in my mouth. [If so, Hacker had a uniquely mobile anatomy - Ed.] 'He fell for that old dodge?'
'You always treat an open microphone as a live one. Doesn't he know that?'
Bernard tried to defend him. 'I don't think he's done a lot of broadcasting, Prime Minister.'
'It sounds as if he's done too much.'"
-- Yes Prime Minister - The Tangled Web, by Jonathan Lynn and Antony Jay