Note: Subsequently re-released on DVD.
"I'd like to see UNIT develop into something quite substantial."
Derrick Sherwin joined the Doctor Who production office during the latter days of Patrick Troughton's tenure as the second Doctor.
At a time when the series was under extreme pressure to simply get on air each week, Derrick was asked to act as story editor — to improve the structure and dialogue in some of the scripts.
As script editor and eventually producer, he then became deeply involved in planning the changeover from Patrick Troughton to Jon Pertwee — the third Doctor.
In this fascinating Myth Makers, Nicholas Briggs uncovers the quite detailed planning that went into the changeover, the creation of UNIT and finds out that the switch to Earthbound stories would have gone ahead even if Patrick had stayed!