The actor, who is set to return for another season, told BritainsTelegraphthis could be his last go.
This could be my final year its terrifying, he told theTelegraph.
I loveDoctor Whobut it can be quite an insular world and I do want to do other things.
Credit: Simon Ridgway/BBC
There will come a time when this is over.
But I knew that when I started.
I was thinking about my regeneration scene from the outset.
Thats my terrible melancholic nature.
When you accept the job you know therell come a day, inevitably, when youll be saying goodbye.
Capaldi recently appeared intheDoctor WhoChristmas special, The Husbands of River Song, withAlex Kingstonas River Song.
She continued, I cant imagine, myself, the Doctor being a different gender.
I just think that too many men have played that role [already].
