The Catherine Tate & David Tennant sketch from Comic Relief Tennant plays substitute teacher Mr. Logan, who goes head to head with Tate’s 'Lauren Cooper'. Absolutely hilarious, this one never gets old! (from Geek Chic ~JB pop-Eggs)
this brought tears to my eyes. I love donna noble and I always will. She is and will forever remain my favorite companion for this reason. To me, she seems more relatable than any other of the doctor's companions.