Searching for the third segment to the Key to Time brings the Doctor and Romana to present-day Earth, where the travellers have to contend with stone circles, Druidic rituals and a not-so-mythical goddess known as the Cailleach.
as The Doctor
as Romana
as K-9 (voice)
as Professor Rumford
as Vivien Fay
as De Vries
as Martha
