King Hydroflax – Greg Davies
Ramone – Phillip Rhys
Flemming – Rowan Polonski
Scratch – Robert Curtis
Concierge – Anthony Cozens
Alphonse – Chris Lew Kum Hoi
Receptionist – Nicolle Smartt
King Hydroflax’s Body – Liam Cook
Voice of Hydroflax – Nonso Anozie
Starline Galactic Villain – Clem So
General production staff
Head of Production – Gordon Ronald
Line Producer – Tracie Simpson
Location Manager – Iwan Roberts
Unit Manager – Iestyn Hampson-Jones
Production Co-ordinator – Adam Knopf
Assistant Production Co-ordinator – Sandra Cosfeld
Production Assistants – Sion Crowle, Jade Stephenson, Sheryl Bradford, Jamie Shaw
Unit Drivers – Sean Evans, Kyle Davies
Production Accountant – Simon Wheeler
Assistant Accountant – Justine Wooff
Camera and lighting department
1st Assistant Director – Francesco Reidy
2nd Assistant Director – James DeHaviland
3rd Assistant Director – Danielle Richards
Assistant Directors – Chris Thomas, Gareth Jones, Alex Miarli
Script Supervisor – Nicki Coles
Camera Operator – Mark McQuoid
Focus Pullers – Jonathan Vidgen, Steve Rees
Grip – John Robinson
Assistant Grip – Sean Cronin
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
Art Department Accountant – Bethan Griffiths
Production Buyer – Linda Morgan
Set Decorator – Adrian Anscombe
Prop Buyers – Vicki Male, May Johnson
Concept Artist – Stephen Cooper
Graphic Artist – Matthew Clark
Standby Props – Liam Collins, Jonathan Barclay
Standby Carpenter – Paul Jones
Prop Hands – Scott Howe, Nigel Magni, Matt Watts
Standby Art Director – Chris Barber
Standby Rigger – Colin Toms
Head Scenic Artist – Clive Clarke
Storeman – Jamie Southcott
Prop Master – Paul Smith
Props Chargehand – Kyle Belmont
Props Driver – Gareth Fox
Props Makers – Alan Hardy, Jamie Thomas
Construction Manager – Terry Horle
Construction Chargehand – Dean Tucker
Construction Driver – Jonathan Tylke
Construction Labourer – Mike Cox
Practical Electrician – Christian Davies
Draughtspersons – Zsofia Ekler, Julia Jones
Chargehand Carpenter – John Sinnott
Carpenters – Tim Burke, Lawrie Ferry, Matt Ferry, Chris Daniels, Julian Tucker, George Rees, Dan Berrow, Keith Richards, Campbell Fraser, Mark Painter, Joe Painter, Michael Venables
Costume department
Assistant Costume Designer – Georgie Sayer
Costume Assistants – Andie Mear, Ian Fowler
Make-up and prosthetics
Make-up Supervisor – Sara Angharad
Make-up Artists – Megan Bowes, James Spinks
Prosthetics – Millennium FX
Movement
Stunt Co-ordinators – Crispin Layfield, Dani Biernat, Jo McLaren
Stunt Performers – Belinda McGinley, Rob Jarman
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 Editor – William Osman
Special and visual effects
VFX Editor – Dan Rawlings
Colourist – Gareth Spensley
Sound
Sound Recordist – Deian Ll┼╖r Humphreys
Dubbing Mixer – Tim Ricketts
Sound Maintenance Engineers – Tam Shoring, Christopher Goding
Dialogue Editor – Darran Clement
Foley Editor – Jamie Talbutt
The Doctor encounters River Song on a colony world during a scheme involving a valuable diamond hidden inside King Hydroflax. River fails to recognise the DoctorΓÇÖs new face and treats him as a stranger. Their adventure leads to a spaceship filled with RiverΓÇÖs former husbands. When she finally realises his identity, they share a heartfelt reunion. The Doctor takes her to Darillium, where they spend their final night together before her known fate.
The Doctor, played by Peter Capaldi, meets River Song on a remote colony world where she does not recognize him.
This takes place at a point in RiverΓÇÖs timeline before she fully knows the Twelfth Doctor, creating a comedic and emotional mismatch.
River has been hired by the cyborg king Hydroflax to perform a dangerous operation involving a powerful brain contained in a diamond casing.
Their relationship is playful and romantic, with the Doctor trying to keep his identity hidden while River gradually pieces it together.
The episode explores love, time travel, identity, and the bittersweet nature of the Doctor and RiverΓÇÖs relationship.
