Ko Sho Blo! Trigger-happy space police the Judoon are targeting 21st-century Gloucester. The Doctor, Yaz, Ryan and Graham race back to Earth in order to prevent them doing too much damage to the cathedral city. But who are they looking for, and what did they do to incur the wrath of the Judoon?

• Sydney Newman
• Donald Wilson
• C. E. Webber

• Gerard Horan
• John Barrowman
• Mark Bonnar