6/7 The Doctor and Susan are once again taken prisoner by the Daleks.
BBC Television Service
5/7 Ian and Barbara join a Thal force that will penetrate the Dalek city from the rear...
4/7 Pretending to be a Dalek, Ian finds that that he is trapped inside the casing.
3/7 Fearful of a Thal attack, the Daleks force Susan to trick the Thals.