I loved Donna at the time, but I don't really want her back for the special. Her loud personality would probably overshadow all the other companions too much.
*See's two doctors*
Donna- OOOH THIS.IS.BONKERS! This reminds me of the time my girlfriend Stephanie thought she saw her boyfriend making out with another man. Turns out it was his twin brother!
Clara- You had to travel with this?
Clara- Ow my tiny ears!
Shame Donna won't meet Amy
"Is this what you do? Trade up for a younger ginger?"