* GirlShowGhetto: The novels have almost no female characters at all, because at the time they were written it was generally accepted that girls would read books with boy main characters, but not vice versa. The TV series goes a bit over the top in compensation with the three boys meeting an entire family of girls, and in season two Will and Beanpole find themselves a couple of very willing bridesmaids while on their way to the Games.
* HarsherInHindsight: It's bad enough when we learn that Eloise's reward for wining the contest is to serve the Tripods in their City. It's even worse when we learn that she serves them [[spoiler: as a stuffed specimen.]]
* InferredHolocaust: Realistically speaking, the fate of Hans in ''The City of Gold and Lead''. He is alone and disabled on an island, that is NOT self-sufficient, with no means of traveling to the mainland. The Capped mainlanders have no reason to care about him or render assistance. It's painfully obvious that he will starve to death, and, given his expression as Will and Beanpole are leaving, he clearly knows it.
* SerialNumbersFiledOff: The Tripods are inspired by the fighting machines from ''Literature/TheWarOfTheWorlds'', as is the appearance of the Masters as giant tentacled heads.