- Hilarious in Hindsight:
- When discussing Jackie's distress, the Doctor adds "Well, she's not coming with us. I don't do families." Give it five seasons, Doctor.
- Jackie did indeed end up traveling in the TARDIS in the next series finale.
- The Doctor tries to talk his way out of the trouble he's in for "borrowing" Rose for a year instead of a day, saying he'd hired her as his "companion." Cue the immediate question about the nature of that relationship. Billie Piper would later star in Secret Diary of a Call Girl.
- The Doctor repeatedly refers to Mickey Smith as "Ricky". In "Rise of the Cybermen", it is discovered that Ricky Smith is the alternative version of Mickey in Pete's World.
- Memetic Mutation: "Excuse me, do you mind not farting while I'm saving the world?"
- Visual Effects of Awesome: That model of Big Ben being torn apart by a model of a Slitheen spaceship. Pictures of the act of building the clock face prove that the staff took a lot of time trying to build it just right. Somewhat downplayed when you realize they got the clock faces turned around the wrong way in the moment of truth, though this apparently wasn't the fault of the effects team — the director supposedly told them that he'd film the approach shots as if the spaceship were approaching Big Ben from the south, only to instead film it approaching Big Ben from the north, forcing them to flip the footage since it otherwise wouldn't have matched, and there was no time to redo it.
YMMV / Doctor Who S27 E4 "Aliens of London"