How many times has another actor played the Doctor?

[Bones2]

Trevor Martin, in the stage play Seven Keys to Doomsday.
http://tardis.wikia.com/wiki/Doctor_Who_and_the_Daleks_in_The_Seven_Keys_to_Doomsday
David Banks played the Doctor for one night in The Ultimate Adventure.
http://tardis.wikia.com/wiki/Doctor_Who:_The_Ultimate_Adventure

 

[OmahaStar]

This list might surprise you. I knew there were a lot of them, but dang.

 

[wamdue]

alot of stage plays as well