The Doctor's moods are wide and in a jumble as he settles into his new regeneration. Elsewhere a set of genius twins are kidnapped, whose mathematical computations can manipulate features of the universe. They're immediately put to work by aliens for an as yet unknown end. Written by
Did You Know?
First full appearance of Colin Baker
as the Doctor after debuting at the end of the previous serial, The Caves of Androzani. See more
That is a direct order form the Minister, and may my bones rot for obeying it.