- Ain't Too Proud to Beg: Magus Riga, when Merel is about to awaken the Cybermen.
- Alas, Poor Villain: Poor Merel.
- Ancient Astronauts: The ancient Cybermen, which double as a Sufficiently Advanced Alien for the people of Tasak, who passed them down in legends as gods.
- The Assimilator: The Cybermen strategy is to install tombs into developing planets until they have significantly grown, and when they wake, of course, assimilate.
- Body Horror: The "Silver" directly converts bodies to steel.
- Call-Back:
- Cyberman: You belong to us. You will become like us.
- When talking about the history of the Cybermen:
- The Doctor namedrops Leonardo da Vinci again.
- Call-Forward: Released earlier (but taking place later) the Eight Doctor will meet another android and humans involved in the Orion war in The Sword of Orion.
- Cassandra Truth: The Doctor warns everybody of the Cybermen, but nobody believes him.
- Chekhov's Volcano: The Doctor hopes to invoke one to destroy the Cybermen's tunnel system.
- Dragon with an Agenda: Merel to the Magus.
- The Dog Bites Back: The Cybermen prepare to sacrifice Merel, who then turns around and helps detonate the charges.
- Fantastic Racism: The Great Orion war is between humans and a species of androids that employ cyberweaponry against one another.
- Gilded Cage: Sara is kept in one, because Magus Riga tries to force her into a Bureaucratically Arranged Marriage.
- Go-to Alias: The Doctor has an invitation to the conclave as "Johannes Smither"
- Humanoid Aliens: The Doctor's similarity to a human is noted.
- Human Popsicle: The Cybermen, as per usual.
- Human Resources: The Cybermen, again, as per usual.
- If My Calculations Are Correct: Temeter can give them out when needed.
- "I Know You're in There Somewhere" Fight: Riga to a converted Merel.
- Immune to Bullets: Both the Cybermen and Temeter (And probably Sara too.)
- Indy Ploy:The Doctor: Plans change, you've got to be flexible.
- My Country, Right or Wrong: Etin respects the Magus, but has to obey the Duke.
- Nanomachines: Tasak have developed "Medicine" of "Magic silver" which are revealed to be nanotech created by the Cybermen.
- Nobody Here but Us Statues: Played with with a Cyberman mistaken to be a statue carved out of steel.
- "Not So Different" Remark: The Androids take pride in that they act more ethical than the humans do in the Orion war, until the Doctor points out they're the same.
- Ridiculously Human Robots: Temeter and Sara are Androids. The Doctor doesn't know until they reveal themselves.
- Steampunk: Tasak is just leaving a steam age, but is already constructing things like scanners.
- Talking Your Way Out: The Doctor keeps a Cyberman talking (and thinking) just in time for a steam plume to hit it and scald it to bits.
- Take Me to Your Leader: The Doctor'd rather surrender than risk a less than 50% chance of getting shot and instead utters this.
- Tap on the Head: Temeter takes out a guard this way.
- This Banana is Armed: The Doctor has a soldier think he's armed with a "Thermal blaster" also known as a dreaded copper kettle.
The Doctor is looking for parts in an intergalactic junkyard, where he finds an Apocalyptic Log of Temeter and Sara.What happened to them, and why is it in a robotic drone?
- Call-Back: The Doctor mentions he had a clever dog once.
- The Cybrid trader mentions the "Round hole style" of the TARDIS and that he prefers the gothic style. He's cut short when he mentions—
- Call-Forward: The TARDIS' Coral Desktop.
- Fate Worse than Death: Sara's consciousness had been plucked out of her android body and inserted into a forklift drone.
- Sequel Episode: This is a one parter that follows directly after the Kingdom of Silver.
- The Singularity: Mentioned to be the result of the Orion war.
- "Where Are They Now?" Epilogue: For Sara and Temeter.
