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Story Code: DDD / Season 7 UK Airdate: 9 May to 20 Jun 1970 Doctor: Jon Pertwee
First airings by location UK Repeats / Foreign Cable and Satellite Previous Story / Next Story

This story aired in the following known countries. They are listed in chronological order according to known airdate. If no month is noted, the actual airdate is not confirmed, and is a close approximate. (Refer also to Selling Doctor Who for expanded airdates.)

United States Sep 72 NTSC
Guam Dec 73 NTSC
Philippines 76 NTSC
Canada 76? NTSC
Saudi Arabia Jun 77 b/w
Bangladesh Sep 80? b/w
  • When the story was classified A by the censors in Australia in April 1971, the serial (in b/w) was then not able to be sold to any other Commonwealth country screening the series in b/w at that time, such as New Zealand, Singapore, Hong Kong, Gibraltar.
  • The only sales were to countries that broadcast in NTSC or black and white.
  • It was not sold anywhere in its original PAL format. The tapes had been wiped by 1973.
  • It was dubbed into Arabic.
  • When the PAL tapes were converted to NTSC in 1972, an early edit of part five was used, featuring an additional scene not in the UK broadcast.
  • The original PAL tapes were wiped by early 1973.
  • The NTSC tapes were recovered from Canada in early 1983. They were sold for syndication in the United States a few months later.
  • The tapes were returned to the BBC by December 1983.


  • It was released again in early 1985, as part of a package of all 24 Jon Pertwee stories, and sold to the United States.
  • It was screened for the first time (as NTSC to PAL coversions) in:
New Zealand Jul 85 N/PC
Australia Mar 86 N/PC
Ireland Dec 99 PAL

US TV Guide descriptions (1970s Pertwees)

More Information
Title: Inferno, sometimes "The Inferno"

  • Episode 1: Dr. Who tries to prevent the destruction of the planet by volcanic eruption.
  • Episode 2: A strange liquid from the Earth's crust defies analysis.
  • Episode 3: Dr. Who gets caught in a space-time machine.
  • Episode 4: Dr. Who is held prisoner in an alien world.
  • Episode 5: Earth is threatened by an explosion.
  • Episode 6: If you can't beat 'em, go home ... easier said than done—Dr. Who's trapped in the 22nd century.
  • Episode 7: Terrifying events from the future are repeating themselves on earth.

US TV Guide descriptions

More Information
Title: The Inferno

  • Episode 1:
  • Episode 2:
  • Episode 3:  
  • Episode 4:  
  • Episode 5: The drill site explodes on the parallel planet.
  • Episode 6: The Brigadier and Liz try to force Dr. Who to take them to Earth.
  • Episode 7: Terrifying events from the future are repeating themselves.