He tells her that he has ordered the setting of bombs in the planet's atomic fuel dump and that they will soon die in a massive explosion. The V-41 is too large to land in the forty minutes that remain before the explosion so Clancey heads back to Ta once he rips out the remote control device. Hermack sends Warne out in a minnow after Caven's fleeing Beta Dart ship. Clancey lands on Ta and releases the Doctor and the others. The Doctor goes to the fuel dump and manages to defuse the bomb with seconds to spare.
Warne simultaneously attacks the Beta Dart and the ship explodes.
Robert Holmes was asked to script this story given very little notice. It sadly has the distinction of being the latest story produced that is mostly lost, though it is considered lackluster by many. Vocals were performed in the incidental music by Mary Thomas, with instrumentals by Terrance MacDonagh and Eric Allen, adding to the Dudley Simpson score. No infringement intended.