If i remember right it is when donna had to erase her memory of being the doctor/donna and when the doctor had to leave her home and she didnt even know who he was and wasn't aloud to remember or she would die.... i think now lol
this was after the two episodes with Davros (creator of the darleks) and the whole children of time thing e.g Capt Jack, Martha, Rose, the two doctors, Micky and roses mum

Hope i helped :D

If i remember right it is when donna had to erase her memory of being the doctor/donna and when the doctor had to leave her home and she didnt even know who he was and wasn't aloud to remember or she would die.... i think now lol
this was after the two episodes with Davros (creator of the darleks) and the whole children of time thing e.g Capt Jack, Martha, Rose, the two doctors, Micky and roses mum

Hope i helped :D

got it all right except it's 'Daleks' not 'Darleks.' He's just British so you have to take his accent into account.

big fan of the doctor :)

lol woops irish like but yeah just spelling it as it sounded in my head ha

His companion donna had to have her mind erased and when he saw her grandad he looked like that