Production
| Episode | Broadcast date | Run time | Viewership |
Archive |
|---|---|---|---|---|
| "Episode 1" | 31 January 1970 (1970-01-31) | 24:15 | 8.8 | PAL colour restoration |
| "Episode 2" | 7 February 1970 (1970-02-07) | 23:08 | 7.3 | PAL colour restoration |
| "Episode 3" | 14 February 1970 (1970-02-14) | 23:16 | 7.5 | PAL colour restoration |
| "Episode 4" | 21 February 1970 (1970-02-21) | 25:00 | 8.2 | PAL colour restoration |
| "Episode 5" | 28 February 1970 (1970-02-28) | 23:58 | 7.5 | PAL colour restoration |
| "Episode 6" | 7 March 1970 (1970-03-07) | 24:15 | 7.2 | PAL colour restoration |
| "Episode 7" | 14 March 1970 (1970-03-14) | 22:55 | 7.5 | PAL colour restoration |
After the previous story, producers Derrick Sherwin and Peter Bryant (who was originally to have the producer's credit on this story) were transferred to the television series Paul Temple, and the BBC intended for Barry Letts to become producer. However, Letts was committed to another production, and could not be released until after the location work on Silurians was completed. Script editor Terrance Dicks and his assistant Trevor Ray shared the production responsibilities for the location work.
The incidental music for the serial was composed by Carey Blyton, who would also contribute music for Death to the Daleks (1974) and Revenge of the Cybermen (1975).
This story is the first to be recorded using colour studio cameras. The previous serial, Spearhead from Space, was the first in colour, but was shot entirely on location (i.e., outside the electronic TV studio), and on film (as opposed to videotape, the standard method for recording Doctor Who). Due to the move to colour, the production team made use of a technique known as Chromakey (or sometimes CSO), which allowed images to be superimposed over each other using colour separation. This was used extensively in the series for many years, beginning with this serial.
Location filming took place at Marylebone station in London on 12 November 1969, but after the prints were damaged, the scenes were reshot on 24 November after the rest of the serial had been finished. Other location work was undertaken in Surrey, with the heathland scenes filmed at Hankley Common.
Read more about this topic: Doctor Who And The Silurians
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