Oh, Grandfather! Couldn’t we stay a bit longer? The Thals are such nice people!
And the Daleks are not, which is more important, my child!
From the loinskin clad cave dwellers of “100,000 BC”, the Doctor, Susan, Ian, and Barbara move on to, well, the blonde-haired, blue-eyed, padded vest- and leather pants-wearing Thals of “The Mutants” (Story Production Code B). A slight improvement, at least on a hygienic level.
But no one ever spares a thought for the peaceful Thals and their worship of history and penchant for wearing foam rubber, because the Daleks make their debut:
This story, also known as “The Daleks” for somewhat obvious reasons, transformed Dr. Who from that show that came on before Juke Box Jury to phenomenon. As Howe and Walker put it in Doctor Who: The Television Companion:
Virtually overnight, this gentle, partly educational family series for Saturday teatimes was transformed into the show that, for many people, just had to be watched at all costs.
Stretching over seven episodes, “The Mutants” featured the Daleks quite prominently from episode two onwards, and the mystery of just what hid within the machine monsters is stoked by the appearance of a claw peeking from under a cloak where the Doctor and Ian unceremoniously dumped the contents of a disabled Dalek at the end of episode three. Such hints at greater mystery undoubtedly kept viewers riveted.
But the Daleks aren’t the only stars of this show, and “The Mutants” sets up several lasting Whovian themes.