When the Doctor and Leela arrive on a desert mining planet where much of the work is done by robots, a series of mysterious deaths means the hidden killer must be found before all humans are destroyed.
Series
114 primary booksAdventures of the 4th Doctor is a 114-book series with 114 released primary works first released in 1975 with contributions by Terrance Dicks, Ian Marter, and Christopher Bulis.
Series
2 released booksKaldor City is a 2-book series first released in 1979 with contributions by Terrance Dicks and Chris Boucher.
Doctor Who
Series
121 primary books123 released booksTarget Books Doctor Who (Numerical Order) is a 123-book series with 123 released primary works first released in 1965 with contributions by Terrance Dicks, Ian Marter, and Malcolm Hulke.
Series
123 primary booksDoctor Who Novelisations is a 123-book series with 123 released primary works first released in 1965 with contributions by Terrance Dicks, John Lucarotti, and Philip Hinchcliffe.
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