| In Theaters | N/A | |||
| On 4K UHD | Not Available | |||
| On Blu-ray | Not Available | |||
| On DVD | August 14, 2007 | |||
Synopsis Mortally wounded by the Spider Queen on Metebilis 3, the Doctor is forced to regenerate. His recuperation is cut short as UNIT investigates a spate of robberies involving components for a top-secret disintegrator gun. The culprit is quickly identified as a highly sophisticated robot built by Professor Kettlewell, which is being ordered to act against its Prime Directive. (Episodes 1-4, 98 mins)