As the team tries to escape from Leek, their "host" offers Lester an ultimatum.
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* DemotedToDragon: Deconstructed and ultimately Defied. Helen worked for Leek throughout the series, though made clear ''she'' called the shots. Now with Leek in control, and no longer afraid of her, she instantly defects, repulsed at the idea of becoming this trope for real.
* DisappointedByTheMotive: Cutter is disgusted that Leek is willing to engineer an extortion racket by threatening to unleash creatures into civilian population areas unless his demands are met, and that Helen is willing to go along with it to get resources to fund her research into the anomalies.
-->'''Cutter''': Money?! ''Money''?! Is that what this is all about?!
-->'''Leek''': The anomalies are unstoppable now and in the future money won't mean much, but knowledge and power will, and I intend to be very, ''very'' powerful!
-->'''Cutter''': ''[rounds on Helen]'' You knew? You knew all of this and yet you still helped him?!
-->'''Helen''': ''[shrugs]'' [[ForScience I need the right environment to conduct my research]].
* DudeWheresMyRespect: Leek is left seething that Cutter won't give him any credit for his EvilPlan, assuming he's just Helen's lackey.
-->'''Cutter''': We're not going to die. Helen's a lot of things, but she's not a killer.
-->'''Jenny''': You really think she's in charge here?!
-->'''Cutter''': Yeah, Leek doesn't have the wit to do this on his own.
-->'''Leek''': ''[listening in on their conversation]'' He's seen what I can do and yet he still belittles me?!
-->'''Helen''': It's your own fault, Oliver. [[BeneathSuspicion You're too good at being insignificant]].
* EvenEvilHasStandards: Helen, despite being willing to use Leek's ambitions to further her own ends, clearly has no patience for his overweening ambition and sadism, to the point that she tries to help Nick in slapping him down when Leek is trying to feed the rest of the team to a Smilodon.
-->'''Nick''': Stop this!
-->'''Helen''': ''[to Leek]'' Alright. You've had your nasty little joke.
* EnemyCivilWar: {{Invoked}}: Stephen, Cutter and Helen activating the feeding signal to lure the animals to the main room, where they'll end up killing each other for food. They can ensure this by locking them in from the outside.
** SpannerInTheWorks: Unfortunately, a raptor ends up smashing its head against the external locking controls, meaning the room can only be locked from the inside, leading to..
*** HeroicSacrifice: Cutter decides to go back into the room, [[MoreHeroThanThou only to be punched be Stephen, who does the deed himself. He even tells Cutter "I choose this".]]
* ForScience: Helen's declared motivation for an alliance with Leek; she wants a secure facility where she can study and learn how to use the anomalies.
-->'''Helen''': The world changed in a new direction once before. Your friend Jenny proves that if we can control the anomalies, we can make it happen again.[…]The last time the world changed, it was an accident, but we can repeat that accident as an experiment under controlled conditions.
-->'''Cutter''': And what happens if, during this experiment, you destroy the world as we know it?
-->'''Helen''': Then we'll bring it back again.
* HiddenDepths: Jenny proves she's quite a good shot when she picks up a rifle and shoots one of Leek's mercenaries.
-->'''Connor''': [[InLoveWithYourCarnage Where did you learn to do that?!]]
-->'''Jenny''': Most of my friends liked pony club. ''(reloads)'' I prefer clay pigeons.
* HostageSituation: With his plan thwarted, the creatures he planned to release recaptured and ARC soldiers about to storm his base of operations, Leek tries to engineer one of these to regain the upper hand over Lester.
-->'''Leek''': Have you ever seen a man [[HalfTheManHeUsedToBe torn in half]] on live TV, Lester?! Call off your men, or [[CruelAndUnusualDeath I shall order the creatures to dismantle Professor Cutter, joint by joint]]!
-->'''Lester''': ''([[TranquilFury furious]])'' The government does ''not'' negotiate with hostage takers!
-->'''Leek''': Thirty seconds, then they kill him! Your choice.
* GoryDiscretionShot: We never actually see Leek died, but it can be assumed that the Future Predators [[EatenAlive ate him.]]
* HoistByHisOwnPetard: Leek is ultimately killed by his Future Predator guards after Cutter disables the machines controlling them.
* KilledOffForReal: Leek bites it, [[TearJerker as does Stephen]].
* KnowWhenToFoldEm: Helen quickly decides to ditch Leek's scheme and team up with Cutter after Leek grows a backbone against her and gets too sadistic in method for her liking.
* NotAfraidOfYouAnymore: With Leek's plan in full motion, he quickly shoots down Helen when she tries to browbeat him yet again:
-->'''Leek:''' You do not give me orders! No one does!
* PercussivePrevention: When Cutter intends to be the one to lock himself in the cage room with the creatures, just as he says goodbye to Stephen and moves to make the sacrifice, Stephen punches him in the jaw and takes his place in the brief moment that Cutter is floored.
* PraetorianGuard: It turns out that Leek is using futuristic tech Helen provided him with that lets him control Future Predators, and planned to use them to protect himself when he takes over the world. [[LampshadeHanging He even name-drops the trope.]]
* VillainousBreakdown: Leek rants hysterically at Cutter for ruining everything after he disables the Future Predators' restraining device, leaving him powerless to control them as they surround him.
* WhamShot: After Stephen dies, Helen places an ammonite on his grave, before glancing upwards... [[UnexplainedRecovery revealing another cleaner]]...then another...and another...[[CloneArmy and another....and another.....]]