Tennant "here to stay" as the Doctor

New Time Lord David Tennant has insisted he won't be following in the footsteps of Christopher Eccleston and quitting after one series.

The Casanova star, who takes the TARDIS for a spin for the first time on Christmas Day, told tonight's Jonathan Ross Show: "It's a bit of a gamble. The danger is that you get stuck with it, but the other option is you don't do it. I didn't want to be that guy. As long as I don't get the sack, I'll do another series."

Meanwhile, Tennant admitted apprehension over the audience's reaction to his Doctor. "It's almost too exciting, all a bit daunting. It was the most successful TV show of the year; if it all goes wrong it's my fault."