Episode 1 of 4 from Galaxy 4
Saturday, 11th September 1965 5:40PM BBC 1 (24 mins)
On a seemingly barren planet, the travellers meet the Drahvins, a predominantly female race in constant strife with hideous monstrosities, The Rills. The Doctor discovers that the planet will explode in two days and the Drahvins desperately ask for help.