Key had to tread very carefully. He is on record as saying "when my chief of staff speaks to someone he speaks for me". Key also has no choice but to take similar responsibility for the Henry inquiry as he set it up. But he is refusing to take responsibility for Vance's phone records being sent to the inquiry by the Parliamentary Service or for Henry seeking swipe-card data on Vance's movements around the parliamentary complex.
Whether such distinctions of convenience will wash with the public remains to be seen. But the Opposition was certainly not fooled by the sudden change to Mr Nice. There were regular interjections of "he's lying" and "he's gone" from the Labour benches.
Labour's David Shearer and the Greens' Russel Norman seized on one email in particular. It said the Henry inquiry was interested in "any contact" between ministers' landlines and Vance's landline, parliamentary extension and mobile number.
But Key noted the inquiry had later emailed the service to say it had not sought records of "all calls' between "the phone numbers of interest".
In the end it was stalemate. The Opposition parties failed to land the requisite king-hit. Key had a real struggle to sound convincing.
It now rests on Parliament's privileges committee to do what it has promised to do - establish the facts of what actually happened.
Debate on this article is now closed.