8.0/106 votes#1 - Inferno (3)
Season 7 Episode 21 - Aired 5/23/1970
The Doctor has vanished from the Inferno project… or has he? He finds himself in the same place, but everyone has changed… and the drilling is closer to its deadly conclusion.
Director: Douglas Camfield
Writer: Don Houghton
7.9/108 votes#2 - Inferno (1)
Season 7 Episode 19 - Aired 5/9/1970
England, the near future. UNIT is providing security and scientific support for the Stahlman project, an attempt to tap the Earth's core for energy. But things are already going wrong…
Director: Douglas Camfield
Writer: Don Houghton
7.6/105 votes#3 - The Mind of Evil (5)
Season 8 Episode 9 - Aired 2/27/1971
The Doctor is forced to help the Master control the mind parasite while Yates finds out where the Thunderbolt has been taken only to be captured by the Master's men.
Director: Timothy Combe
Writer: Don Houghton
7.5/106 votes#4 - Inferno (2)
Season 7 Episode 20 - Aired 5/16/1970
Strange deaths, men changing into monsters, hot green slime pouring out of the waste pipes – but Professor Stahlman is determined to press ahead with the Inferno project no matter what the cost!
Director: Douglas Camfield
Writer: Don Houghton
7.5/106 votes#5 - Inferno (5)
Season 7 Episode 23 - Aired 6/6/1970
The parallel Inferno has broken through the Earth's crust, unleashing terrible seismic forces and dooming the planet. The Doctor hopes to return and save his world. But the bestial primords are closing in...
Director: Douglas Camfield
Writer: Don Houghton
7.3/106 votes#6 - Inferno (6)
Season 7 Episode 24 - Aired 6/13/1970
The Doctor is trapped in a parallel world that is going up in flames. Can he escape in time to save Earth in his own universe?
Director: Douglas Camfield
Writer: Don Houghton
7.3/107 votes#7 - Inferno (7)
Season 7 Episode 25 - Aired 6/20/1970
The Doctor has escaped the catastrophic destruction of a parallel world. But can he stop Stahlman before he destroys this one?
Director: Douglas Camfield
Writer: Don Houghton
7.2/105 votes#8 - The Mind of Evil (1)
Season 8 Episode 5 - Aired 1/30/1971
The Doctor and Jo head to Stangmoor Prison to investigate the Keller Machine, which drains the evil impulses from prisoners' minds, while UNIT are handling security at the first world peace conference.
Director: Timothy Combe
Writer: Don Houghton
7.2/104 votes#9 - The Mind of Evil (2)
Season 8 Episode 6 - Aired 2/6/1971
The Doctor is recalled by UNIT to help investigate Cheng-Tiek's murder but is unaware that Chin-Lee is under the control of the Master.
Director: Timothy Combe
Writer: Don Houghton
7.2/104 votes#10 - The Mind of Evil (3)
Season 8 Episode 7 - Aired 2/13/1971
Realising Chin-Lee has been using the power of the Keller Machine to carry out assassinations, the Doctor heads back to Stangmoor, only to find the Master has teamed up with Mailer to stage another riot.
Director: Timothy Combe
Writer: Don Houghton
7.2/104 votes#11 - The Mind of Evil (4)
Season 8 Episode 8 - Aired 2/20/1971
With the Doctor and Jo being held prisoner, the Master convinces Mailer to help him steal the Thunderbolt.
Director: Timothy Combe
Writer: Don Houghton
7.2/104 votes#12 - The Mind of Evil (6)
Season 8 Episode 10 - Aired 3/6/1971
The Brigadier has recaptured Stangmoor but the Master still has control of the Thunderbolt and the Doctor must find a way to stop him and destroy the Keller Machine.
Director: Timothy Combe
Writer: Don Houghton
7.0/106 votes#13 - Inferno (4)
Season 7 Episode 22 - Aired 5/30/1970
In a parallel England, the Doctor tries desperately to convince his captors of the immense peril they are in. But they are convinced he is a spy. And penetration zero is getting close…
Director: Douglas Camfield
Writer: Don Houghton
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Don Houghton Ratings Summary
"Inferno (3)" is the best rated episode written by Don Houghton. It scored 8/10 based on 6 votes. It was directed by Douglas Camfield. It aired on 5/23/1970 and is rated 0.1 points higher than their second-best episode, "Inferno (1)".