"I enjoyed the success very much," he said. "I revelled in it, but by that time I was a grown-up and I knew what was important and what was not. It's not a persona I need to shake off. To be honest, I've made so many documentaries since that time it doesn't really bug me if people want to believe I'm the stupidest person to stride the planet."
Robinson, 67, said Blackadder's success means the "office door is always open if I have a new idea".
He has a long interest in history and archaeology which has taken him around the globe for the History Channel's Time Team. His brief is to walk city streets discovering hidden treasures, meeting people and telling viewers about little known stories.
The team also spent time in the red zone, checked out the rising cardboard cathedral and visited the "fantastic 185 white chairs" memorial to those lost in the 2011 earthquake.
But he insists the Christchurch section of his series is "not a programme about the earthquakes".
He acknowledges the city faces a huge rebuilding job.
"It's an inspiring job," he said. "To come to a city like this you suddenly realise how fragile the whole human condition is ... that at any moment it can just disappear. To be confronted with that is salutary."