Alex Fitch continues his exploration of the actors who have been hired to play incarnations of Doctor Who after the original actors have passed on. Alex talks to John Guilor about providing a new voice for William Hartnell’s First Doctor in reconstructed ‘missing’ scenes for BBC DVDs; and to Tim Treloar about continuing the adventures of the Third Doctor in Big Finish audio plays, now that Jon Pertwee is no longer with us.

More: info about 'Tenth Planet' Doctor Who events

Article about the recording of The Third Doctor Adventures at bigfinish.com

Behind the scenes video of recording The Planet of Giants