I forgot all about this... and just saw it on the program guide for tonight, at 7.30pm on channel 22 (ABC Kids).

Ironically, it is on at the same time a different episode of Dr Who screening on channel 23 (currently playing Capaldi episodes)... and with a completely different episode on later in the evening on channel 22 (from the Matt Smith era), it's three different episodes from 3 different seasons on the one night.