Which two Doctors met in " Time Crash " ?
On many occasions the Eleventh Doctor has actually encountered himself from a different point in his timeline : in " The Big Bang " , the mini-episodes " Time " and " Last Night " , and in " Journey to the Centre of the TARDIS " , at the end , the Doctor interacted with his past self to reset time , by giving himself a device that helps get the TARDIS to escape the salvagers ' magnetic beam before they can activate it .