Inferno (Doctor Who)

054 – *Inferno*
054 – Inferno
Doctor Who serial
Cast
	Doctor Jon Pertwee – Third Doctor;
	Companion Caroline John – Liz Shaw;
	Others Caroline John — Section Leader Elizabeth Shaw; Nicholas Courtney – Brigadier Lethbridge-Stewart/Brigade-Leader Lethbridge-Stewart; John Levene – Sergeant Benton/Platoon Under-Leader Benton, Primord Benton; Olaf Pooley – Professor Stahlman/Director Stahlman; Christopher Benjamin – Sir Keith Gold; Sheila Dunn – Petra Williams/Dr. Petra Williams; Derek Newark – Greg Sutton; Ian Fairbairn – Bromley; Walter Randall – Harry Slocum; Derek Ware – Private Wyatt; David Simeon – Private Latimer; Roy Scammell – RSF Sentry; Keith James – Patterson; Dave Carter, Pat Gorman, Walter Henry, Philip Ryan, Peter Thompson – Primords;
Production
Directed by	Douglas Camfield; Barry Letts (episodes 3–7, uncredited)
Written by	Don Houghton
Script editor	Terrance Dicks
Produced by	Barry Letts
Music by	Stock music
Production code	DDD
Series	Season 7
Running time	7 episodes, 25 minutes each
First broadcast	9 May 1970
Last broadcast	20 June 1970
Chronology
← Preceded by; The Ambassadors of Death	Followed by →; Terror of the Autons
	List of episodes (1963–1989)

Inferno is the fourth and final serial of the seventh season of the British science fiction television series Doctor Who, which was first broadcast in seven weekly parts on BBC1 from 9 May to 20 June 1970. The serial remains the last time a Doctor Who story was transmitted in seven episodes. This serial was also the last regular appearance of Caroline John in the role of Liz Shaw.

In the serial, the alien time traveller the Third Doctor (Jon Pertwee) transports himself "sideways in time" to a parallel world, where a British drilling project causes catastrophic amounts of heat and force to be unleashed when it penetrates the Earth's crust.