[quote=Magic Magnum]
And for Goku to come back you need the 7 dragon balls.Plus, your assuming the Doctor would allow Goku to face him in head on combat.Ha ha... Ha ha... That's cute.
[/quote]

Plus everyone else in all universes. You do realize how many overpowered creatures and people there have been made ever right? The Doctor has literally no place to cower, either.