After a stunniung performance at a friendly cricket match, the Doctor, together with Tegan, Adric and Nyssa, is invided to a splendid masked ball by Lady Cranleigh and her son, Charles.

But a dark menace haunts the secret corridors of Cranleigh Hall. And before the ball is over, the quiet summer will be shattered by the shocking discovery of a brutal murder ...

This is a novelisation by Eric Saward of his own television story, first broadcast in 1982.
 

Starring Peter Davison

The Tereleptils have come to Earth in the 17th century and are responsible for the spread of the Great Plague. Their explosive attempts to return home won't endear them to humanity either...

Originally transmitted 15-23 February 1982

Starring Peter Davison

Heroic exploits on the cricket field and murderous events off it test the Doctor
as the TARDIS team get involved with the Cranleigh family in 1925 England.
The attic hides a dark family secret and Nyssa sees double (this was the first
purely historical story since The Highlanders in 1966)

Originally transmitted 1-2 March 1982