The Web of Fear

The Web of Fear is the fifth serial of the fifth season of the British science fiction television series Doctor Who, first broadcast in six weekly parts from 3 February to 9 March 1968. Written by writers Henry Lincoln and Mervyn Haisman, the serial is a sequel to 1967 serial The Abominable Snowmen. The plot concerns the incorporeal Great Intelligence and its robotic Yeti minions invading the London Underground in order to lead the time travelling Second Doctor (Patrick Troughton) into a trap where it can drain the Doctor's mind of its knowledge. The Web of Fear marks the first appearance of Nicholas Courtney as Colonel Alistair Lethbridge-Stewart, who would serve as a major recurring character in the series going forward.

The serial was commissioned as a result of then story editor Peter Bryant being highly pleased with The Abominable Snowmen, additionally wanting to feature the Yeti more due to a desire to include more "monsters" in the series. Haisman and Lincoln decided to set the story in the London Underground, wanting the serial's events to be close to home for viewers. The Yeti were redesigned after their appearance in the prior serial, giving the creatures a "rougher" appearance. Due to difficulties in scheduling the Underground for filming, the Underground was reconstructed as a set at BBC studios, where most of the serial's filming took place.

The serial has been regarded as an iconic serial in the series and has received largely positive reviews from retrospective critics. Following the serial's airing, the serial's episodes were destroyed, rendering the serial as missing. One episode was recovered in 1978, with four other episodes being recovered in Nigeria in 2013. The serial's third episode has not been recovered but was reconstructed via animation for a 2021 physical release of the serial.

The TARDIS lands in a deserted London Underground, with London appearing to be completely abandoned. The elderly Professor Travers (Jack Watling) had previously met the Second Doctor (Patrick Troughton) and his companions forty years earlier in Tibet, where the group had fought off the villainous Great Intelligence; Travers had brought back a robotic Yeti with him, which he recently had accidentally re-activated. The Yeti escaped, and in the following days, London was beset by a deadly web-like fungus. Travers and his daughter Anne (Tina Packer) are working with the British military to try and resolve the situation.

The Doctor and his companions encounter the military, who are trying to stem the spread of the fungus by demolishing tunnels with explosives. The explosives are rendered unable to detonate by a number of Yeti, which allows the Doctor to deduce that the Great Intelligence has returned. Travers is able to convince the military that the Doctor will be able to help them stop the Intelligence. Soon after, the group is joined by Lieutenant-Colonel Lethbridge-Stewart (Nicholas Courtney), who takes command.

The fungus begins to expand into the military's explosives stores, rendering them unusable. The Doctor discovers a Yeti-attracting beacon at the scene, indicating to him that someone in the base is working with the Intelligence. The base is attacked by Yeti, killing several soldiers and kidnapping Travers. The Doctor tells the military of the TARDIS, and a group is sent to retrieve it to allow for later escape, though all the soldiers barring Lethbridge-Stewart are killed.

Soon after, Travers, possessed by the Intelligence, arrives at the military's base. The Intelligence explains that it seeks to drain the Doctor's mind of knowledge. The Doctor appears to submit to the Intelligence, but not before reprogramming a Yeti to aid his allies. Later, the traitor is revealed to be one of the soldiers named Arnold (Jack Woolgar), who has been killed and possessed by the Intelligence. As the Doctor enters a device to have his mind drained, the reprogrammed Yeti attacks Arnold while the others drag the Doctor out of the device and destroy it, which causes the Intelligence to disperse. The Doctor reveals he had intended to use the device to drain the Intelligence, and hence the others' interference has allowed it to escape back into space. The Doctor and his companions depart in the TARDIS.

Story editor Peter Bryant was so greatly pleased by Mervyn Haisman and Henry Lincoln's previous serial, The Abominable Snowmen, that Bryant commissioned a sequel for the serial to be produced before The Abominable Snowmen had even aired. Bryant sought to include more "monsters" in the series as he believed they were popular with viewers. The Great Intelligence and its Yeti minions were brought back, with Haisman and Lincoln deciding to set the serial in the London Underground in order to provide a familiar backdrop that would "bring the Doctor's adventures far closer to home". Haisman and Lincoln stated that the Underground also served as a logical location for potential invaders of London to try and control. Bryant soon took over as producer for the series, resulting in Derrick Sherwin taking over as script editor. Sherwin found himself having disagreements with Haisman and Lincoln, who were very protective over their scripts.