Susan is now very ill and in desperate need of medical help. Leon finds a doctor.
Barbara and Susan are saved from the guillotine by two royalists, Jules and Jean, but why?
In Paris, Ian, Barbara and Susan are sentenced to death by guillotine.
Attempting to return Ian and Barbara home, the TARDIS lands in 18th century France.
6/6 The Doctor sees the poisoning was caused by deadly nightshade and finds a cure.