The Sleeping Blood written by Martin Day was the first story in the 2015 The Companion Chronicles audio box set The First Doctor: Volume One. It featured Susan. This was a rare example of a First Doctor-lite story, set before any other companions joined the Doctor. This unique setting gave Susan the kind of spotlight she had never enjoyed on-screen.

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



  • Using its chameleon circuit, the TARDIS disguises itself as a large alloy cupboard.
  • The name of the Earth colony Rua is derived from the Hebrew word for "wind" as the first settlers observed an extremely strong wind.
  • The Time Lords developed nanomedicine thousands of years before the Doctor and Susan left Gallifrey.
  • Kendrick refers to Superman.


  • This is the first Companion Chronicles release within a new pattern of releases, grouping four stories with one Doctor into a box set rather than as individual releases. It also marks a new form of box set, releasing it in a 4 disc jewel case as into 4 separate jewel cases contained within a cardboard sleeve.
  • Art for this release was seen on a video on the official Big Finish YouTube channel. It was originally done as fan art by Simon Hodges and was used by the YouTube channel. The video has since been removed over some issues with copyright and image clearance and approval. The image can be found here.
  • Given that the TARDIS' chameleon circuit is operational, this is one of the few Doctor Who stories in any medium in which the TARDIS appears in a form other than that of a police box.


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