Because it was time for him to go he didn't want to be the doctor anymore and that's why they regenerate so that they can go from actor to actor without it being obvious
After the next two episodes then he will regenerate
3. season 1 had Christopher Eccleston then he Regenerated seasons 2,3, and 4 when he is gonna regenerate again.
no
No.
David Tennant is Scottish.
David Tennant is an actor.
David is 6 foot 1
David is the youngest child
Yes, David Tennant is a man.
David Teninch
no
No he's not.