- McKay: You know we could be a team. You could be my sidekick.Ronon: Sidekick?McKay: Yeah, it'll be like Batman and Ronon. Has a nice ring to it.
While wandering around the city turning off unnecessary systems, McKay and Zelenka discover a previously unknown Ancient lab. When McKay tries to figure it out, he gets zapped by a strange energy beam. Dr. Beckett gives him a clean bill of health, but it's not long before he starts to exhibit Special Powers! At first it's just enhanced hearing and the occasional telekenesis, but soon he's reconfiguring the city power grid and inventing new forms of math.
It turns out that the machine that zapped him reconfigured his DNA; its purpose was to physically prepare people for Ascension. While McKay enjoys the perks of being an all-but-Ascended superhuman (which now include mind reading and more-than-usual insufferable genius), Zelenka sets himself to figuring out the machine that did it — and he and Weir discover the catch. McKay is going to keep evolving until he reaches the point of Ascension — at which point all of his lower functions will shut down, and he will either Ascend or die. And since this is McKay we're talking about, and Ascension has spiritual as well as a physical component, it pretty much looks like option 2 here. After his standard "I'm about to die" freakout fest (rendered a bit shorter than usual by his ability to read minds) McKay decides to dedicate his last days to improving Science as much as possible.
The others encourage him to at least try to Ascend &madsh; and Weir points out that he can always retake human form afterwards. McKay builds himself an Ascend-O-Meter to keep track of how well he's doing, and Sheppard, as the local expert on Ascension, does his best to pass on the tips he learned during his six months with the Ascension colony. McKay embarks on a campaign of good deeds and soul-searching; he writes Weir a glowing biography, heals Ronon's scars, serves Teyla some tea, and apologizes to Zelenka for being such a Jerkass all the time. While the Ascend-O-Meter shows some improvement, however, it simply isn't enough. McKay despairs of being able to Ascend and starts leaving instructions for the disposal of his remains. And then he collapses.
The med team rushes McKay to the infirmary, where Beckett confirms that it's pretty much over. As he nears Ascension, his body is losing its ability to do more basic things, like breathe and keep his heart going. The team gathers around for a somewhat emotional farewell as the Ascend-O-Meter ticks down. Just as everything hits zero, McKay suddenly grabs Beckett and whispers something — a way to save himself! They rush him back to the machine that caused the trouble in the first place, and Beckett and Zelenka (who's been working down there this whole time) are able to use it to reset McKay's DNA, based on an old blood sample. Everything is zapped back to normal, and all our heroes have to worry about now is all the awkward things they said to one another over the course of the episode.
- A Mind Is a Terrible Thing to Read: It takes McKay from the Infirmary to the Gate Room, to go from thinking that mind reading is cool to becoming very annoyed by it. He's particularly disappointed to realize that a woman walking past was thinking Ronon was hot, not him.
- In a later scene, when Sheppard and Weir come to tell McKay what they've discovered about his condition, they intend to break it to him as gently as possible. But McKay just reads their minds and gets the whole story up front, and whips himself up into a panic. Sheppard does have to admit, though, "There is something easier about this."
- Ascend to a Higher Plane of Existence: One of McKay's two options. The other is death.
- Bottle Episode
- Closest Thing We Got: John has to try and talk McKay through how to Ascend, based on his experiences in the time dilation field last year; while he admits that he's not that comfortable with the experience, he is the best available candidate.
- Dying Declaration of Love: Inverted - and open to interpretation. McKay chooses to interpret it as literally as possible.Weir: Rodney, you're a good person. Know that we love you.McKay: You love me? Really? All of you?
McKay: I may not be able to understand this new math I created, but I distinctly remember that you said you love me.Weir: Actually I said we love you andMcKay: And what? You were just saying that because you thought I was dying?
- And later
- "Flowers for Algernon" Syndrome: McKay is especially frustrated by no longer being able to understand the new math he invented.
- Gallows Humor: Rodney attempts this to try and make Elizabeth feel better. It has the opposite effect.McKay: Look, all the Ancients that experimented with that device, they either ascended or died most of the latter, which is why it did not get put into common use.Weir: Like you said, there were exceptions.McKay: Huh. Yes, well, this will all be over soon and you can get back to some real work.Weir: Rodney Dont. (Turns away, blinking back tears.)
- Healing Hands: One of McKay's superpowers.
- Hilariously Abusive Childhood: Zelenka, to hear him tell it.
- Man Hug: McKay and Ronon. Twice.
- Mind over Matter: One of McKay's superpowers.
- Mind Reading: One of McKay's superpowers.
- O.O.C. Is Serious Business: You can tell how seriously McKay is taking his impending doom, because for the rest of the episode he is calm, humble, and considerate of others.
- Pet the Dog: Rodney deciding to use some of his remaining time to perform good deeds for his friends. Particularly apologising to Zelenka for how badly he's treated him over the years, as well as healing the scars on Ronon's back.
- Scars Are Forever: Subverted by Healing Hands, as McKay heals some of Ronon's remaining injuries from his time as a Runner.
- Super Intelligence: One of McKay's superpowers.
- Superpowers For A Day
- Super Senses: Super hearing, anyway.
- Technopath: One of McKay's superpowers.
- The Determinator: Elizabeth. She refuses to even think about Rodney dying, spending the whole episode trying to find a way to save him. Lampshaded by Elizabeth herself.McKay: Youre not still trying to find a way out of this for me, are you?Weir: You think Im gonna give up?
- With Great Power Comes Great Insanity: Discussed (but otherwise averted)McKay: (to Ronon) She wants you to shoot me if you think for even one second that I might be trying to take over the city for my own evil purposes.
- Undying Loyalty: Elizabeth refuses to give up on Rodney, trying to convince him he is worth more than his contributions to science and that, while he may not, she believes he is capable of ascension. Likewise, Rodney has written an entire 500 page book defending Elizabeth and her leadership because he believes that someone should leave a record of everything shes done right.
- The X of Y