Fury from the Deep is the completely missing sixth serial of the fifth season in the British science fiction television series Doctor Who, which originally aired in six weekly parts from 16 March to 20 April 1968.

In this serial, the Doctor (Patrick Troughton) and his travelling companions Jamie McCrimmon (Frazer Hines) and Victoria Waterfield (Deborah Watling) find themselves at a Euro Sea Gas refinery off the coast of contemporary England, where an infectious weed spreads rapidly, infecting and mind controlling anyone who comes into contact with it, including the refinery leader Robson (Victor Maddern).

The trio are captured and put in a cell by Robson, a ruthless gas refiner who heads a pumping operation with a network of rigs spanning the North Sea.

Harris believes Robson's pride is making him refuse to shut off the gas flow in order to properly investigate the feed lines, but his calculations are mysteriously gone from his briefcase.

She falls ill, and Harris ends up asking the Doctor for assistance after Victoria has helped the travellers escape from their cell by picking the lock with her hairpin.

Meanwhile, Mrs. Harris is visited by Mr. Oak and Mr. Quill, technicians from the command centre who have already been infected by the seaweed, and have long green tendrils growing along their arms and backs of their hands.

Arriving after, the Doctor can't determine what's wrong with Mrs. Harris, but his suspicions are aroused by the seaweed, and he, Jamie and Victoria return to the TARDIS to study it.

The Doctor experiments on the seaweed, which when returned to water grows in size and strength, and seems to become malevolent before they successfully seal it in its aquarium.

With Robson disappeared and now aware of the real threat, Harris assumes control of the command centre, calling in Megan Jones, Director of Euro Gas.

The Doctor commandeers a helicopter and travels with Jamie to the rig where Victoria has been taken, where they find Robson mostly transformed into a seaweed creature.

Through the video link, it is clear the foam has dissipated and all of the humans have returned to normal, including Robson and Mrs. Harris.

Hubert Rees later played Captain Ransom in The War Games (1969) and John Stevenson in The Seeds of Doom (1976).

The cover advertised the volume as a special "bumper" edition, referring to its increased length in comparison to other Target novelisations and as explanation of the consequently higher retail price.

Edited by Richard Bignell, it lasts fifty minutes and includes interviews with key members of the production team.

In 1993, an abridged audio cassette version was released featuring linking narration by Tom Baker in character as the Fourth Doctor, reminiscing about the incident.

On 27 October 2019, BBC Studios announced that Fury from the Deep would be released on DVD and Blu-ray in 2020 with all 6 episodes animated.

Ultimately Pemberton attended rehearsals and the opening night, appearing on local TV to promote the show and share memories of the original production.