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Heartstopper (2022)/S3E3 · Talk/Isaac at the zoo: The Loneliest Girl in the Universe
Heartstopper · Season 3, Episode 3, "Talk"

Isaac at the zoo: The Loneliest Girl in the Universe

Isaac Henderson (Tobie Donovan) · The zoo, Nick's birthday

Isaac at the zoo: The Loneliest Girl in the Universe. Evidence card from Heartstopper: The Loneliest Girl in the UniverseGet credit for sleuthing this sceneDrop the frame
Heartstopper · S3 E3Sleuthed by @shelfsleuth
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What it tells you

Nick's birthday trip to the zoo and Isaac brings a novel called The Loneliest Girl in the Universe. To a group outing. The title is a lot, even for him.

Sources: All the books Isaac reads in Heartstopper, season three, Meeghan reads · Every book that Isaac reads in Heartstopper, Kobo · Isaac's reading list in Heartstopper season 3, Nose in a Book · A Complete Heartstopper Book List, The Geeky Waffle
Every book in Heartstopper43 books →

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The book

Cover of The Loneliest Girl in the Universe by Lauren James

The Loneliest Girl in the Universe

Lauren James · 2017 · YA novel

Lauren James's 2017 novel about Romy, a teenager alone on a spaceship, whose only contact is messages from Earth that take years to arrive. Then a second ship gets in touch. Isaac reads it surrounded by his friends, which is either irony or a cry for help, and the show isn't saying.

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The show

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Sleuthed by @shelfsleuth · 2026-10-20

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Also in Heartstopper

All 43 books
Cover of Dune Messiah by Frank HerbertIsaac's first book: Dune MessiahS1 E1Cover of Naruto, Vol. 72 by Masashi KishimotoIsaac's manga: Naruto, Vol. 72S1 E2Cover of Quantum Mechanics: The Theoretical Minimum by Leonard Susskind and Art FriedmanIsaac's physics for fun: Quantum Mechanics: The Theoretical MinimumS1 E3Cover of Proud: My Autobiography by Gareth ThomasIsaac at rugby practice: ProudS1 E4Cover of A Good Girl's Guide to Murder by Holly JacksonIsaac's YA thriller: A Good Girl's Guide to MurderS1 E4Cover of Radio Silence by Alice OsemanIsaac at the bowling alley: Radio SilenceS1 E5Cover of Pride and Prejudice by Jane AustenIsaac's game night Austen: Pride and PrejudiceS1 E5Cover of Gender Explorers: Our Stories of Growing Up Trans and Changing the World by Juno RocheIsaac's lunch reading: Gender ExplorersS1 E7Cover of There Is No Planet B: A Handbook for the Make or Break Years by Mike Berners-LeeIsaac's sports day book: There Is No Planet BS1 E8Cover of Ace of Spades by Faridah Àbíké-ÍyímídéIsaac flips through: Ace of SpadesS2 E1Cover of I Love This Part by Tillie WaldenIsaac's season two opener: I Love This PartS2 E1Cover of The Importance of Being Earnest and Other Plays by Oscar WildeIsaac's Oscar Wilde: The Importance of Being Earnest and Other PlaysS2 E2
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