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David Tennant has refused to comment on how much longer he will stay with Doctor Who.
The actor, who took over from Christopher Eccleston as the Time Lord last year, is contracted until the end of the fourth series in 2008 - but has given no commitment beyond that.
Having taken the award for best actor at the National Television Awards earlier this week, Tennant was asked if the acclaim meant he would be tempted to stay with the show for longer. "That's a good question," he replied. "I'm not going to answer it."
Tennant previously revealed that he had a firm idea of when he would quit.
