In addition to the 97 episodes that no longer exist, some episodes no longer exist in their original format. Four episodes only survive in an edited state - Doctor Who: Checkmate (1965) ("The Time Meddler": Episode 4), Doctor Who: The Final Test (1966), Doctor Who: The War Machines: Episode 3 (1966), and Doctor Who: The War Machines: Episode 4 (1966). Furthermore, eleven episodes only survive in black and white whilst originally filmed in colour - The Ambassadors of Death: Episodes 2, 3, 4 and 7, "The Mind of Evil" (all six episodes) and Doctor Who: Invasion of the Dinosaurs: Part One (1974). Many of the Jon Pertwee episodes from the early 1970s, made in colour, now only exist as poorer quality NTSC 525-line colour versions recovered from Canada, the original 625-line colour master tapes having been wiped by the BBC in the 1970s, and as 16mm black and white telerecordings which had been kept by BBC Enterprises. For some Pertwee episodes wiped by the BBC, NTSC colour versions were not recovered and they remained only as the 16mm black and white telerecordings for many years. In the early 1990s, three serials (Doctor Who: Doctor Who and the Silurians: Episode 1 (1970), Doctor Who: Terror of the Autons: Episode One (1971) and Doctor Who: The Dæmons: Episode One (1971)) were restored to colour using the 16mm black and white telerecordings and the colour signal from NTSC domestic recordings to create new master copies on D3 digital tape. Doctor Who: Planet of the Daleks: Episode Three (1973) was restored to colour for the serial's DVD release in 2009 using the colour signal (also known as chroma dots) discovered in the black and white telerecording. All the colour master tapes starring the last four Doctors, Tom Baker, Peter Davison, Colin Baker and Sylvester McCoy have survived in the BBC archives.
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05-03-2025 alle ore 07:55