The Doctor, Ace and Hex land in Alaska. Well technically not in Alaska, but rather in a mysterious island that wasn't there four years, three months and six days ago.
But the existence of a citadel with mysterious slumbering creatures called Lurkers are more interesting to the Doctor, until he finds himself on the wrong end of a gun, as an Alaska expedition is ready to tamper with forces they don't understand, and it seems their fate is to unleash horrors upon the world.
Lurkers at the Sunlight's edge contains examples of:
- Advanced Ancient Acropolis: The Citadel.
- A God Am I: Whytecrag eventually jumps off the slippery slope and considers himself one.
- Bad Boss: Whytecrag doesn't give a single toss for any of his employees, including his Number Two, Slade.
- Bavarian Fire Drill: The Doctor manages to bluff his way into an expedition by pretending he's from the same "institute".
- Becoming the Mask: CP Doveday.
- Because You Were Nice to Me: Ace is the only person that treats CP with kindness.
- Bedlam House: Subverted, the Institute that Doveday finds himself in is a tailor made surrounding just for him.
- Bittersweet Ending:The Doctor: He will dream of the thing that most touched him. What could that be, I wonder?elsewhereLurker: ...Aaaaaaaaaceeeee...
- Black Speech: Several characters, and the Lurkers.
- Call-Back: The TARDIS is still white.
- The Doctor goes to help Ace with a Literal Cliffhanger and mentions he's done this sort of thing before.
- The Doctor either slipped something in Ace's pocket, or the anoraks in the TARDIS come automatically equipped with Yeti cloths.
- Hex mentions he saw one of his friends come back from literal death.
- Hex boasts he's taken bullets before.
- Cave Mouth: The Citadel door looks like many fangs, according to Hex.
- *Click* Hello: As the Doctor is climbing down to save Ace, Hex is caught off guard by one.
- Clingy MacGuffin: The Ice key that opens the Citadel.
- Cooldown Hug: Ace manages to calm down CP with one.
- Cult: Bordering on a Religion of Evil, but not quite.
- Disney Death: Professor Corbin.
- Dying as Yourself: Invoked.Ace: HE WANTED TO DIE A HUMAN.
- Fakin' MacGuffin: The Ice key inside the Institute.
- Genius Loci: The Citadel itself might very well be alive.
- Gentleman Adventurer: Emerson Whytecrag the III. Not a good one though.
- Ghost Butler: The door to the Citadel closes itself after the expedition has gone in.
- Go Mad from the Revelation: Professor Corbin only catches a glimpse of the power inside the citadel, which instantly whipped up a storm and froze all of his men inside it, and became terrified.
- Hoist by His Own Petard: Yes, by all means, confront the Lurkers with a broken key in order to appeal to their better nature Whytecrag.
- Human Popsicle: Several of a previous expedition's men are frozen in a gigantic pillar of ice.
- Human Sacrifice: Whytecrag plans to use the Doctor, Ace and Hex as such. In the end, he's left with Hex.
- "I Know You're in There Somewhere" Fight: Poor, poor CP.
- Literal Cliffhanger: Ace slips off into a crevice and is in need of rescuing.
- Ludicrous Precision: The Doctor knows exactly how old the mysterious island is.
- Meat Moss: Lots of the inside of the Citadel.
- No Celebrities Were Harmed: CP Doveday.
- Number Two: Slade.
- The Professor: Professor Corbin.
- Pulp Magazine: CP Doveday writes for them.
- Sealed Inside a Person-Shaped Can / Humanoid Abomination
- Sunken City: The Citadel was one.
- Superpowered Evil Side: CP Doveday harbours one.
- Tomato in the Mirror: CP Doveday.
- "Truman Show" Plot: Though not for a TV show, the Institute is only there for CP Doveday.
- Tunnel Network: Underneath the Institute.
- Whole-Plot Reference: At the Mountains of Madness.
