Rassmussen – Reece Shearsmith
Nagata – Elaine Tan
Chopra – Neet Mohan
474 – Bethany Black
Deep-Ando – Paul Courtenay Hyu
King Sandman – Paul Davis
Sandmen – Tom Wilton, Matthew Doman
Morpheus Presenter – Zina Badran
Hologram Singers – Natasha Patel, Elizabeth Chong, Nikkita Chadha, Gracie Lai
Voice of the Computer – Nikki Wilson
General production staff
Line Producer – Tracie Simpson
Production Manager – Steffan Morris
Location Managers – Iwan Roberts, Nick Clark
Unit Manager – Iestyn Hampson-Jones
Production Co-ordinator – Adam Knopf
Assistant Production Co-ordinator – Sandra Cosfeld
Production Assistant – Si├┤n Crowle
Production Accountant – Simon Wheeler
Camera and lighting department
1st Assistant Director – Dan Mumford
2nd Assistant Director – James DeHaviland
3rd Assistant Director – Danielle Richards
Assistant Directors – Chris Thomas, Gareth Jones
Script Supervisor – Steve Walker
Camera Operator – Mark McQuoid
Focus Pullers – Jonathan Vidgen, Steve Rees
Grip – John Robinson
Camera Assistants – Cai Thompson, Matthew Lepper, Scott Waller
Gaffer – Mark Hutchings
Best Boy – Andrew Gardiner
Electricians – Bob Milton, Gareth Sheldon, Gawain Nash, Rob Fernandes
Art department
Supervising Art Director – Dafydd Shurmer
Production Buyer – Linda Morgan
Set Decorator – Adrian Anscombe
Props Buyer – May Johnson
Concept Artist – Stephen Cooper
Graphic Artist – Matthew Clark
Standby Props – Liam Collins
Standby Carpenter – Paul Jones
Standby Art Director – Julia Challis
Props Storeman – Jamie Southcott
Props Driver – Gareth Fox
Props Makers – Alan Hardy, Jamie Thomas
Construction Manager – Terry Horle
Construction Chargehand – Dean Tucker
Practical Electrician – Christian Davies
Scenic Artist – Clive Clarke
Costume department
Costume Supervisor – Simon Marks
Assistant Costume Designer – Georgie Sayer
Costume Assistants – Andie Mear, Ian Fowler, Jenny Tindle
Make-up and prosthetics
Make-up Supervisor – Sara Angharad
Make-up Artists – Megan Bowes, James Spinks
Movement
Stunt Co-ordinators – Crispin Layfield, Dani Biernat
Choreographer – Ailsa Berk
Casting
Casting Associate – Alice Purser
General post-production staff
Post-production Supervisor – Samantha Price
Post-production Co-ordinator – Hannah Jones
Assistant Editors – Becky Trotman, Robbie Gibbon
On-line Editors – Geraint Pari Huws, Christine Kelly
Special and visual effects
VFX Editor – Dan Rawlings
Colourist – Gareth Spensley
Sound
Dubbing Mixer – Mark Ferda
Dialogue Editor – Darran Clement
Foley Editor – Jamie Talbutt
The Doctor and Clara investigate a space station where workers have eliminated sleep using a device called Morpheus. They discover the Sandmen, creatures formed from sleep dust, are attacking the crew. The story unfolds through found footage, revealing the dangers of removing the need for sleep. The Doctor suspects the threat may not be fully contained.
The episode is presented as recovered footage from a future space station where crew members investigate a strange phenomenon caused by sleep itself.
The Sandmen are creatures formed from human eye secretions and sleep particles, created when people are forced to stay awake for too long.
It is framed as a found footage recording assembled by Gagan Rassmussen, breaking traditional storytelling style in the series.
The Doctor appears sporadically, guiding events but not fully controlling the situation, which adds to the unsettling tone.
The episode explores perception, storytelling, and the danger of unchecked scientific experimentation.
