It's still Manhattan. There are still Daleks. They attempt to create a race of Daleks in human bodies, using the Empire State Building as a lightning rod. Dalek Sec is now part human, which the other Daleks ''really'' don't like, and he wants to build their Daleks-in-human-bodies army to be part human as well, which the other Daleks like even less.

The Doctor, however, notices that Dalek Sec is developing human emotions, and races to help him, because sometimes one person with the right idea in the right place is all it takes to change the world. At the same time, Martha and Tallulah try to find what alterations the Daleks did to the Empire State building.

Things get too touchy-feely for the other Daleks, who capture Dalek Sec and go back to the original plan of full-Daleksin human bodies. The the newly piggyfied Lazlo helps the Doctor escape, and after [[WhatTheHellHero wasting time]] hugging Martha, sets off to remove the [[AppliedPhlebotinum Dalekenium]] from the lightning rod.

As Martha improvises a death trap for the Dalek pig slaves, the Doctor fails to remove the Dalekenium, so he throws himself in the way of the lightning and, in what will be a continuing theme throughout this series, screams in absolute agony. The radiation revives the Daleks' army, but the resulting Daleks in human bodies become Time Lord/Dalek hybrids in human bodies instead. The Doctor is delighted at having created a new species.

Dalek Sec sacrifices himself to save the Doctor; the new hybrid species refuses to shoot him, attacking the Daleks instead, and two of the remaining pure Daleks die in the process. Dalek Caan kills off the rest of the hybrids (to the Doctor's dismay), refuses the Doctor's offer of help and escapes. Laszlo is kept alive by the Doctor using the Daleks' genetics lab, although he'll be half pig forever. Talullah doesn't mind too much.


* AbsurdlySpaciousSewer
* AccentUponTheWrongSyllable: An unusual case with Dalek Sec, as he speaks in a breathy near-whisper, but still utilizes the Dalek in''flec''tion.
* AssimilationBackfire: Hybrid-Sec finds himself developing human values and emotions as a result of absorbing human DNA, which eventually causes [[AbsoluteXenophobe the other Daleks]] to execute him in disgust.
* BigApplesauce: Tallulah says "if aliens had to come to Earth, no wonder they came here" while looking breathlessly at the Manhattan skyline. Of course, the funny thing is that many, many more have targeted London and [[AliensInCardiff Cardiff]].
* BlackDudeDiesFirst: Invoked and enforced - Daleks have been taking humans for experimentation and conversion into either pig slaves or human Daleks, up until Solomon tried to reason with them.
* BondVillainStupidity: The Doctor standing on the backs of the theater seats, staring straight at the Daleks who are inexplicably not shooting him despite the fact that he more or less asked them to, could be the poster image for this Trope.
* UsefulNotes/BritishEnglish: American-born Laszlo uses the word "lift" instead of "elevator". Maybe being turn into a pig-slave gave him a desire to use British terms.
** Alternatively, hanging around the Doctor can give anyone the desire to use British slang.
** Or maybe he ''did'' say "elevator" and the [=TARDIS's=] TranslatorMicrobes were just going slightly further than was really necessary.
* CaptainObvious: "They killed them, rather than let them live."
* CloseKnitCommunity: The Hooverville
* ContinuityNod: Although they don't use the terms 'the Dalek/Human Factor', the plot concept of the Daleks wanting to imbue humans with the Dalek nature and the Doctor wanting to imbue Daleks with the human nature is very reminiscent of "[[Recap/DoctorWhoS4E9TheEvilOfTheDaleks The Evil of the Daleks]]".
* [[PunkPunk Dalekpunk]]: Amusingly, the hybrid army is armed with Dalek ''tommyguns''.
* DisneyDeath: The Doctor.
* DrivenToSuicide / SuicideByCop: The Doctor right after Solomon's death. He actually dares the Dalek that just killed Solomon to go ahead and kill him next...and there's absolutely nothing in the story or Tennant's performance to indicate that he's bluffing or has some kind of brilliant plan up his sleeve. It seems that watching a good man the Doctor had grown to like and respect get killed right after [[SedgwickSpeech appealing to a better nature]] [[AlwaysChaoticEvil Daleks just don't have]] was the very last straw. [[BerserkButton Daleks just seem to bring out all the Doctor's darker emotions]], even the ones that cloud his desire for self-preservation.
* {{Foreshadowing}}: Less pertaining to the episode specifically and more to the series as a whole, "I am Dalek Sec, and you will obey me!"
* GossipyHens: Thay and Caan discuss their doubts about Sec's new orders. Caan even [[CrowningMomentOfFunny checks to make sure no one can hear them]].
* HalfHumanHybrid
* HeelFaceTurn: After becoming a HalfHumanHybrid, Dalek Sec changes his plans for Earth, and instead opts to recreate the Daleks all as half-humans instead of full Daleks in human form. He convinces the Doctor to prepare for the gamma storm that will give the new race life and pleads for use of his TARDIS to take them to a planet so they can begin anew. Sadly It doesn't work as Dalek Caan and the other two betray him at the last minute, switch the transformation to full Dalek and capture and kill Sec.
* HeroicSacrifice: From Dalek Sec, of all people - when Thay fires at the Doctor, Sec (who has been crawling on all fours like a dog) gets up and is hit by the shot instead.
* HumanityIsInfectious: Dalek Sec eventually rejects the Dalek's warmongering, and tells the rest of the Cultists if they continue their Dalek ways, they'll find nothing but destruction.
* HumansAreTheRealMonsters: Cited as Dalek Sec's motivation for combining himself with a human -- now he can feel man's hatred, ambition and propensity for war.
* HumansAreSpecial: The Doctor's counter-argument to Dalek Sec by pointing out the human mind has so much more potential than simply destroying other forms of life. This leads to HumanityIsInfectious, and Dalek Sec eventually changes his plan to make Dalek-Human hybrids and transport them across the universe to rebuild, instead of conquering Earth, which infuriates the other Skaro cultists.
* IgnoredEpiphany: Ignored by the other three Daleks, anyway.
* ImprovisedLightningRod: The Doctor uses ''himself'' as one for a lightning and cosmic ray strike.
* LandmarkingTheHiddenBase
* LightningCanDoAnything: Gamma lightning, apparently.
* [[NiceJobFixingItVillain Nice Job destroying the last of your race, Dalek Caan.]]
* OminousLatinChanting: During the attack on Hooverville.
* PigMan
* PlummetPerspective: Subverted. The sonic screwdriver falls far, but not as far as it looks.
* RedemptionEqualsDeath
* SedgwickSpeech: Here's a hint: never try to appeal to a Dalek's compassion.
* SpikesOfVillainy: Dalek DNA is shown this way.
* TechnicolorScience
* TragicVillain: Guess.
* WastelandElder
* WhoopiEpiphanySpeech: Subverted as the aforementioned SedgwickSpeech.
* [[TheXOfY X of the Daleks]]: First time the classic title format for Dalek episodes shows up in the new series.