Alex Fitch looks at the actors who have been hired to play incarnations of Doctor Who after the original actors have passed on or retired. While the programme has a built in fiction for the constant recasting of the lead role, fans have had a desire to still see and hear new adventures for the 1960s and 70s versions of Doctor Who, and these have begun to be made and licenced by the BBC for broadcast on digital radio, television and download. Alex talks to impressionist Jon Culshaw about playing Tom Baker - otherwise known as the Fourth Doctor - in Dead Ringers, and audiobooks such as The Ark in Space; to actor David Troughton about channeling his father Patrick as an ersatz Second Doctor on BBC Radio 4extra.

More info: Article about the recording of The Ark in Space at ladbrokeradio.com

Review of Doctor Who: Serpent Crest at cultbox.com