Complex sentence: These early episodes numbered a total of 87 episodes, with the producers using the production codes CP001 to CP087; the later 30 episodes, from the second generation of the series, were produced in colour between 16 September 1974 and 11 July 1975.
Split into simpler sentences: These early episodes, numbering a total of 87 episodes, with the producers using the production codes of CP001 to CP087. These earlier episodes are in addition to the later 30 episodes, from the second generation of the series, which was produced in colour, between 16 September 1974 and 11 July 1975.