Norman Jones

Holmes and Watson visit Aldershot, to investigate the violent death of Colonel James Barclay. A tragic love story is unveiled which exposes the identity of a horribly deformed man, the 'crooked man'. His involvement in the case begins to place doubt in Holmes' mind - could Barclay have died of natural causes?

The Doctor and Sarah arrive in Renaissance Italy unaware that they have brought with them in the TARDIS a deadly alien energy force.

UNIT are summoned to Wenley Moor research station which is experiencing mysterious power losses. In the nearby caves, one of the staff has been killed and another sent insane.

The Mandragora energy combines forces with the secret Brotherhood of Demnos. Count Federico plots to steal the Dukedom of San Martino from his nephew, Giuliano.

Investigating the caves, the Doctor is attacked by a dinosaur-like creature. Dr Quinn is hiding a secret that could endanger the lives of everyone.

Tempted by the promises of ultimate power offered by Mandragora, Hieronymous plots to eliminate the threat posed by the Doctor and uses an unwitting Sarah as his weapon.