Spearhead from Space marked not only the arrival of a new Doctor but also the transition from black and white to colour as the show moved into a new decade. This documentary looks at the challenges faced by programme makers during this period.
| Actor | Role |
|---|---|
 Derrick SherwinNot listed | Not listed |
 Terrance DicksNot listed | Not listed |
| BBernard LodgeNot listed | Not listed |
 Timothy CombeNot listed | Not listed |
 Michael FergusonNot listed | Not listed |
 Christopher BarryNot listed | Not listed |
| RRoger CheveleyNot listed | Not listed |
 Frazer HinesNot listed | Not listed |
 Wendy PadburyNot listed | Not listed |