In the parallel world, Earth’s crust has been penetrated, releasing terrible forces from within the Earth. The Doctor must escape back to his world to prevent the same catastrophe.
- Drama
- Year 1970
- 23 min
The Third Doctor: Jon Pertwee Bursting into colour, Doctor Who underwent a dramatic makeover when Jon Pertwee’s debonair dandy arrived, exiled to Earth for four years of action-packed, moralistic adventures.
- Year: 1970
