For over fifteen years the crew of Kollo-Zarnista Mining Facility 27 has been extracting diamonds from deep within the atmosphere of Saturn, diamonds that help to fund the ever-expanding Human Empire. But when a mining operation goes wrong, a rescue mission must be launched to save a worker lost overboard, a worker who claims that he has seen something amongst the swirling clouds. Something that can't possibly exist.
When the Doctor and Bill arrive, they immediately find themselves caught between hostile miners, suspicious security guards and corrupt company officials as they face accusations of sabotage and diamond theft.
And below them, in the crushing atmosphere of the gas giant, something is starting to rise.
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- Twelfth Doctor
- Bill Potts
- Laura Palmer
- Frank Gammadoni
- Jenny Flowers
- Jorgen Delitsky
- Donald Nettleman
- Clive Rince
- Claire Robbins
- Roger Baines
- Gerry Tobins
- Jo Teske
- Lynne Harrison
- Laura Palmer once dealt with an Ogron incursion into Galactic Federation space.
- Laura graduated at the Federation Academy with Honours. Following this, she requested assignment to Kollo-Zarnista Mining Facility 27.
- Frank has a Datapad on his office.
- Frank worked on the reconstruction of the Titan refuelling platform after the great fire of 5012.
- Nettleman lost money at the Olympus Mons Casino.
- The Cancri are at war with the Ba-El Cratt.
- There is a vault in the upper level of the mining facility, in which diamonds are stored.
- By the 51st century, there were no precious metals left on Earth.
- The mining facility uses Security Orbs. The security personnel also use g-Tasers.
- Derek once argued with the Doctor during his lecture about cyclical time.
- Kollo-Zarnista possesses at least two mining bells. When the primary bell was damaged, the secondary bell was calibrated, in order to replace it.
- Nettleman summon Delitsky, Laura and Jenloz to the meeting room.
- Jo takes the Ba-El Cratt in Baines' suit to the medical bay, believing Baines himself is inside the suit.
- Bill drinks hot chocolate.
- Bill notes that the Kollo-Zarnista canteen looks just like the one she works in.
- Delitsky works in the Kollo-Zarnista control centre.
- Claire ponders that the only way to stop the Ba-El Cratt would be to Purge the mining bell.
- The Ba-El Cratt claim asylum on Kollo-Zarnista.
- Bill recalls being impressed when she visited St Luke's server room.
- Delitsky's crew moved the TARDIS to the equipment bay following the Doctor's rescue of the Ba-El Cratt inside Baines’s suit.
- The Doctor picks up a subspace tracking device in the TARDIS.
- Alaskan Eskimos on Earth made their boats from whalebone.
- The Doctor attempts to invoke the Article Fifteen of the Shadow Proclamation, but it's interrupted before he can finish the word "Proclamation".
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- Laura worries that the diamond shipments could attract the attention of criminals such as Rohm-Dutt (TV: The Power of Kroll) or Sharaz Jek. (TV: The Caves of Androzani)
- Bill recalls meeting emoticon robots on a distant planet (TV: Smile) and nearly being eaten by an alien fish on Victorian London. (TV: Thin Ice) This novel was published prior to both those episodes being broadcast.
- The Doctor recalls he recently shot a friend of his on Gallifrey. (TV: Hell Bent)
- Bill compares the TARDIS to a kitchen (TV: The Pilot) and the Doctor runing to "a penguin with its arse on fire" (TV: The Pilot, Smile)
- Jo's older sister worked with Professor Frederick Marius. (TV: The Invisible Enemy)
- Bill dreams of sinuous shapes with gnashing teeth beneath ice, (TV: Thin Ice) robots with smiley faces, (TV: Smile) alien war machines and Heather staring into her eyes. (TV: The Pilot)
- Delitsky jokingly asks Claire if she could see him cutting down trees in Androzani Major. (PROSE: The Caves of Androzani)
- Nettleman knows that attempting to defraud a Federation-backed diamond franchise could lead him to spend his life digging ore on Cygnus A or Varos. (TV: Planet of Evil, Vengeance on Varos)
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