He said the idea of foreign remakes of 'Sherlock' without Benedict Cumberbatch and 'Doctor Who' without a British lead is "insane".
He didn't say that 'Doctor Who' has been pitched for a remake but did say firmly: "You couldn't have more than one Doctor Who in the world. It would just be dreadful."
Meanwhile, it was announced on Wednesday that 'Sherlock' star Andrew Scott is to play an out-of-control rock singer in a new play.
The actor, who plays arch-villain Moriarty in the hit detective show, will appear in Birdland at London's Royal Court Theatre.
Andrew, who was born in Dublin, was named best supporting actor at the 2012 Bafta TV awards for his performance as the great detective's bitter rival.