Geordi is delighted to welcome starship engine designer Dr. Leah Brahms aboard the Enterprise. He's a big fan, having "collaborated" with a holographic recreation of her back in "Booby Trap." She is less enthused. There's nothing creepy about beaming onto a strange starship and finding out the Chief Engineer knows Every Single Thing About You, right? Sure there isn't. Brahms thinks Geordi is a crazed stalker and is understandably less than charmed. She is also married. Then she finds his Holodeck Brahms program—ouch. Meanwhile, the Enterprise inadvertently destroys a space creature and helps to deliver its newborn child with unexpected results.
Tropes featured in "Galaxy's Child" include:
- Aesop Amnesia: In "Booby Trap," Geordi learned he was trying too hard in his (initially) unsuccessful relationship with Christy Henshaw. In this episode, he slips back into trying too hard, going into intricate detail preparing his dinner date with Leah. He even thinks of playing a Johannes Brahms song once again, which was something he'd done during his date with Christy.
- Broken Pedestal: See Whoopi Epiphany Speech.
- Cassandra Truth: Leah refuses to believe Geordi's reassurances that her holographic counterpart was not created for romantic/sexual reasons.
- Happily Married: Leah breaks the news to Geordi once she finally susses out his intentions.Leah: I thought you knew. I mean, you know everything else about me. But Commander, if I'm hearing what I think I'm hearing, then you should know that I'm... married.
- Imprinting: After Worf and Dr. Crusher deliver the space creature's infant by C-section, using the ship's phaser as a scalpel, it starts following the Enterprise, eventually latching on and "nursing" by draining energy from the reactors.
- Let's Just Be Friends: Eventual resolution of the Geordi/Brahms plot.Geordi: I should have told you straight out.
Leah: Well, if you had, then I never would have had the chance to see the look on your face when you walked in on me, and me, in the holodeck.
Geordi: [laughing] The look on my face? How about the look on your face?
- Loving a Shadow: Deconstructed. This episode shows what happens when the real person gets to see the shadow in question, and the results are not pretty.
- The Missus and the Ex: Geordi has a truly unique case of this—both the Missus and the Ex are the same person: one his holofantasy and the other the real woman.
- Monster Is a Mommy: The space creature didn't want the Enterprise around because it was pregnant.
- My God, What Have I Done?: Picard after unintentionally killing the space creature.
- Not What It Looks Like: In the previous episode, Geordi had genuinely not been trying to hook up with holo-Leah. While he did ask the computer to add elements of her real personality, he didn't choose to simulate her (the computer instead making the decision) and even after developing feelings for her never tried to pursue a romantic/sexual relationship with her. Of course, for Leah walking in at the end of the show, it looked more like Geordi had intentionally used her image to generate a Leah love toy.
- Oh, Crap!: Geordi has two in succession, the first when he finds that his crewmember has showed Dr. Brahms the holo-simulation, and the second (even bigger one) when he finds Dr. Brahms already there. His feet momentarily break the other way upon this discovery as if they almost want to say Screw This, I'm Outta Here!.
- Other Me Annoys Me: Leah finds her holographic self from "Booby Trap," who repeats that episode's closing lines, "Every time you look at this engine, you're looking at me. Every time you touch it, it's me." She feels understandably violated, and at that point, nothing La Forge could say would convince her that he didn't do more than collaborate with her holo-self.
- Phlebotinum Analogy: The Trope Codifier is La Forge and Brahms' "souring the milk" explanation—if the baby creature is "nursing" on the Enterprise, then they need to make the energy it's feeding on unappetizing so it will leave.
- Stalker with a Crush: Leah thinks Geordi is this after seeing the holodeck recreation of herself.
- Tempting Fate: During his conversation with Guinan at the beginning of the episode, Geordi claims quite confidently that no matter what, the real Leah Brahms and him will at least be good friends upon meeting each other.
- Visual Pun: Geordi considers employing an audio pun for his date with Leah Brahms, having the computer play some Johannes Brahms as mood music. He decides that's too corny and obvious, and changes it.
- Wham Line: Leah telling Geordi she's actually married.
- Whoopi Epiphany Speech: Guinan's response to how disappointed Geordi is with the real Leah Brahms.Guinan: You had a perfectly wonderful, marvelous little fantasy... until the real Leah showed up and ruined it. Now, she's probably done the most horrific thing one person can do to another—not live up to your expectations. So I'd take a good, long, hard look, La Forge. See her for who she is, not for what you want her to be.