- Achilles' Heel: Unity's biggest weakness is x-ray vision.
- Batman Grabs a Gun: This is the first time that Superman is willing to kill.
- Big Brother Instinct: Superman comes the minute that Kara informs him that a force named Unity tried to assimilate her, and got Martha and Jonathan. He comes to Kara's rescue when Unity ambushes her in the hospital.
- Brick Joke: Kara leaves her bus because she is annoyed at a couple debating about whether the vegetable fields are rutabagas or turnips. In the episode's ending, Martha and Jonathan also start this exact same debate.
- The City vs. the Country: Kara's main issue is that she wants to live the big city life rather than being at the farm with her adopted parents. She at least goes to visit Clark.
- Comically Missing the Point: When the annoying couple asks Kara whether the vegetable fields are rutabagas and turnips, Kara decides to get off the bus. They assume she went to check, and were presumably perplexed that the bus left without her.
- Cosmic Horror Story: The Unity.
- Evil-Detecting Dog: Er, cat. When Kara gets back to the farm, Streaky emerges from hiding to happily greet her, but he immediately freaks in the presence of Jonathan and Martha.
- Ignored Epiphany: Before boarding the bus for Metropolis, Kara bumps into the Preacher. She feels there's something off about him but otherwise doesn't dwell on it, which she later kicks herself for.
- It's All My Fault: Supergirl feels this situation could've been avoided if she had been in Smallville instead of Metropolis. When Superman tries to convince her otherwise, she says she saw the Preacher's arrival into town and didn't bother to check him out, all so that she could get to the big city.
- Kill It with Fire: The Unity's main weakness.
- Not Even Human: The Preacher who brings people to The Unity. He seems to be of the same alien species, or a separate extension of the same individual.
- Pun:
- Volcana asks "Is it hot in here or is it just me?"
- Supergirl poses with a baseball team and is called their "personal batgirl". Kara mentions that it would make Barbara jealous.
- Punch! Punch! Punch! Uh Oh...: A variant; Kara starts fighting head-on to save her adoptive parents from Unity. Then she sees that she's caused Martha to faint and stops her assault to sever the tentacle and fly Martha to a hospital.
- Recycled Animation: When Volcana is fighting Supergirl, there are two full screen frames of a fire explosion that are reused footage from "Where There's Smoke" when Volcana blasted Superman with a fire ball in the parking lot.
- Resistance Is Futile: After Supergirl uses heat vision to break the tendril coming out of Martha, the Preacher tells her that was a futile effort and that they're all one with Unity.
- Shout-Out: Possible one to Jaws, when Supergirl defeats The Unity by throwing a barrel at it and making it explode.
- Slasher Smile: The Preacher sports a particularly creepy one when Kara learns what's going on.
- Take That!: Kara's reaction to a comic book about a superhero with spider-powers.Kara: Eww!
- Tempting Fate: Martha observes that Kara using her powers to collect the eggs upsets the chickens. Jonathan remarks he's glad he didn't tell her to milk the cow, which is immediately followed by a frazzled, off-screen moo.Kara: (Sheepishly holds up an already full tank of milk) Oops.
- The Worf Effect: Superman and Supergirl are shown to have Super-Strength. It turns out that Unity's various tentacles are enough to incapacitate them if they get caught.
