My Favourite Television Show

One of my favourite television show is the famous Doctor Who series.
This show exists since 1963, and it's about The Doctor, a Time Lord of the planet Gallifrey in the constellation of Kasterborous, who got a T.A.R.D.I.S. (Time And Relative Dimension In Spàce), a time machine that can travel to any time and any place. He regenerates himself sometimes: he changes his aspect and personality. That was an idea because the first actor who plays The Doctor  was sick, and for replaced him create that fact. Until todya, has been exist 13 Doctors. Always, he have a companion or two. My favourite Doctor is 10th asn 8th, and my favourite companions are Sarah Jane Smith, Donna Noble, Amy Pond and Rory Williams. Always have problems, because appears aliens that try to kill people or exterminate the Earth.