Colin Baker, announced as the sixth Doctor, with new companion Nicola Bryant, who'll be playing American botany student Perpugilliam 'Peri' Brown. Both make their debuts on screen towards the end of the 1984 series. (C) BBC
Doctor Who: actors who have previously played the famous Time Lord – in pictures
Doctor Who: Urgent Calls (complete adventure) by big-finish on SoundCloud Urgent Calls (A One-Part Story) Earth, An innocent phone call. Okay, it was a wrong number, but there can't be any harm in that.