The Time Lords direct Doctor Who and Jo Grant in their TARDIS to a bleak planet in the year 2471, where they find colonists from Earth under threat from mysterious, savage, monster lizards with frightful claws! And hidden upon the planet is the Doomsday Weapon, for which the Master is intently searching.
Malcolm Hulke was a prolific and respected television writer from the 1950s until the 1970s. His writing credits included the early science fiction Pathfinders series, as well as The Avengers. Hulke was first approached to write for Doctor Who when the series first started, but his idea for The Hidden Planet was not pursued. In 1967 he wrote The Faceless Ones (with David Ellis) for the Second Doctor. By 1969, Hulke's friend and occasional writing partner Terrance Dicks was Script Editor for Doctor Who and needed a ten part story to replace other scripts and write out Patrick Troughton's Doctor. Together, they wrote The War Games, which for the first time explained the Doctor's origins and introduced his people, the Time Lords. Hulke continued to write for Doctor Who, providing a story for each of the Third Doctor's series. Malcolm Hulke died in 1979, soon after completing his novelisation of The War Games.