This Classic Who serial originally aired in 1966. I’m not sure when it hit Australia, but my dad watched it on the ABC as a child, and the Very First Regeneration (Hartnell to Troughton) made enough of an impression on him that he could describe certain scenes to us kids.
But because early television was ephemeral (and the BBC needed to reuse that tape a bunch of times and then burn it), the serial itself was lost. Only the audio track survived.
To celebrate the serial’s 50th anniversary, and to make a quick buck, the BBC has “restored” the video via animation, and the result has been given a limited cinema run.