Doctor Who (season 5)

The fifth season of British science fiction television series "Doctor Who" began on 2 September 1967 with the first story of season 5 "The Tomb of the Cybermen" and ended on 1 June 1968 with "The Wheel in Space". Only 22 out of 40 episodes are held in the BBC archives; 18 remain missing. As a result, only 2 serials exist entirely. However, "The Ice Warriors" and "Fury from the Deep" have had their missing episodes reconstructed using animation, with "The Web of Fear" set to have its missing episode animated for release in 2021.
Casting.
Main cast.
Patrick Troughton, Frazer Hines and Deborah Watling appear as The Second Doctor, Jamie McCrimmon and Victoria Waterfield respectively. Deborah Watling departs in the penultimate story "Fury from the Deep". Wendy Padbury makes her debut as Zoe Heriot in the season finale, "The Wheel in Space".
Guest stars.
Jack Watling makes his first and last appearances in the series as Professor Edward Travers in the serials "The Abominable Snowmen" and "The Web of Fear". Watling would go on to reprise his role of Travers thirty years on in the spin-off direct-to-video film "Downtime".
Michael Kilgarriff makes his first appearance as the Cyber-Controller in "Tomb of the Cybermen". Kilgarriff would reprise the role eighteen years later in "Attack of the Cybermen" (1985).
"The Web of Fear" introduced Nicholas Courtney as Colonel Lethbridge-Stewart. He appeared next in the next season's "The Invasion", and became a regular supporting character in season 7 – season 13. He made subsequent appearances in season 20 and season 26.
Serials.
Victor Pemberton was script editor for "The Tomb of the Cybermen", with Peter Bryant as producer. After this Bryant resumed his role as script editor with Innes Lloyd as producer until "The Web of Fear" where Bryant took over as producer and Derrick Sherwin replaced Bryant as script editor. "The Enemy of the World" was the last serial seen under Head of Drama and creator Sydney Newman, who left the BBC after his contract expired in 1967.
Two serials, "The Tomb of the Cybermen" and "The Enemy of the World", are complete in the BBC's archives; these are also the only complete serials from the first two seasons of Patrick Troughton's tenure as the Doctor. The two missing episodes from "The Ice Warriors" have been recreated in animated form for the DVD release of that story, in a similar fashion to Season 6's "The Invasion". "The Web of Fear" was first released on DVD in 2014 with a Telesnap reconstruction of its missing third episode. In 2020, it was announced that a Special Edition DVD/Blu-ray will be released in 2021 with the missing episode now animated.
"Fury from the Deep" is the most recent serial that is completely missing, with no episodes in the archives, while the other two have three existing episodes between them. It has also, however, received an animated recreation of all six episodes for a Blu-ray and DVD release. 
"The Enemy of the World" saw Patrick Troughton playing both the Doctor and the villainous Salamander; this was the first time that the lead actor had played both his regular part and the part of the villain since Season 3's "The Massacre of St Bartholomew's Eve".
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