Overview
Professor Emil Keller has created a machine that can pacify even the most dangerous of criminals. But when the Doctor and Jo arrive at Stangmoor Prison for a demonstration, things start to go horribly wrong - especially when they discover that the Doctor's old enemy the Master is responsible for the machine.
Details
- Status
- Released
- Release date
- March 6, 1971
- Original language
- English
- Spoken languages
- English
- Countries
- United Kingdom
- Production
- BBC
- Budget
- Not recorded
- Revenue
- Not recorded