The two Doctors become three! - Doctor Who - BBC

The end of the universe has come. Or has it? Donna, who can't even change a plug, has ended up with Time Lord knowledge during her metamorphosis with the Doctor. Sending the skinny-boys-in-suits to work, Donna works her magic with the rest of the team. A brilliant climax to the fourth series of the hit BBC programme Doctor Who, starring David Tennant, Billie Piper, Catherine Tate and John Barrowman. Watch more high quality videos on the new BBC Worldwide YouTube channel here: