No regrets for Tennant after US TV pilot flops

Actor David Tennant has described his failed effort to crack American television as an "interesting learning curve".

The former Doctor Who star had been hoping to make it big with a starring role in Rex Is Not Your Lawyer. He headed to Los Angeles, but TV chiefs in the United States did not commission a full series of the show following the pilot episode.

Tennant says he has still not been informed of what went wrong. "These are enormous empires and you don't hear anything, you just get told what to do," he said.

Tennant, soon to be seen in BBC1 drama Single Father, said the process was a "political minefield".

"You have to be careful about what you say about what you know, because everybody tells you things that they're not supposed to and you're not quite sure what's true and what isn't.

"I learnt a lot about how that network in television works and how I feel about that. It was a very interesting learning curve."

However he said he is not regretting his decision to quit his role as the Time Lord, allowing new boy Matt Smith to take on the role.

"No, it felt just right, actually. It still does. It felt right to pass the baton on and for it to continue to thrive."