"The beginning of one thing can be the rest of everything."
Heartstopper - Easter Eggs & Hidden Details
Easter Eggs
Creator Alice Oseman has a cameo appearance in the Season 1 finale.
During the scene where Nick and Charlie are on the train to the seaside, Alice Oseman can be seen sitting in the same carriage, drawing on a tablet. This is a nod to her role as the creator and original artist of the "Heartstopper" universe.
Tori Spring, Charlie's sister, is the protagonist of Alice Oseman's first published novel, "Solitaire".
The character of Tori (played by Jenny Walser) and her distinctive pessimistic personality were fully established in Oseman's 2014 novel "Solitaire". Her inclusion in "Heartstopper" connects the show to a wider literary universe of Oseman's creation, often called the "Osemanverse".
A poster in Tao's bedroom is for a fictional film called "Radio Silence".
This is a direct reference to another of Alice Oseman's popular YA novels, "Radio Silence". This, along with other subtle nods, helps to ground the series within the interconnected world of Oseman's books.