10th doctor

this is the 10th doctor from doctor who, he is basically a kid in an adults body but when there is trouble he get serious, ide say he’s a good one of the soon to be 16 doctors, his companions in this regeneration are :rose Tyler, Martha Jones and Donna noble. Regeneration happens to him as he is a timelord and is a timelord dies, they regenerate, although most timelords only get thirteen regenerations but he gets 16 if you don’t count the war doctor who ended the time war and probably more