The Sleeping Blood (audio story)

 was the first story in the 2015 Companion Chronicles audio box set The First Doctor: Volume One. Chronologically, the story describes events preceding An Unearthly Child.

Publisher's summary
When the Doctor falls ill, Susan is forced to leave the safety of the TARDIS behind. Exploring a disused research centre in search of medical supplies, she becomes embroiled in the deadly plans of a terrorist holding an entire world to ransom – and the soldier sent to stop him.

The Sleeping Blood (1)
to be added

The Butcher's Citadel (2)
to be added

Cast

 * Susan - Carole Ann Ford
 * Kendrick/The Butcher - Darren Strange
 * Ian Atkins (uncredited)

Continuity

 * The Doctor tells Susan they must not interfere with the affairs of other races, echoing one of the main precepts of Time Lord society. (TV: The War Games)