The Doctor becomes increasingly suspicious of Ian and Barbara but when the occurrences aboard the TARDIS become even stranger he realises they are in even greater danger than they realised.
Did You Know?
This episode was watched by 9.9 million viewers on its original transmission. See more
Grandfather? Look. Look at this huge footprint. It must have been made by a giant.
Musique Concrète (part 2)
Composed by Buxton Orr See more