The Doctor's companion has always been a key character in Doctor Who. Even without a companion the Doctor always seems to find one, like in Planet of the Dead and Voyage of the Damned. The big question is, who is your favourate companion. Now is your time to vote, in our companion poll on the left hand side of the page. We have picked 6 companions from the new series of Doctor Who, from series 1-4. The poll closes on the 1st June, so make sure you get your votes in before the time runs out.