The fifth season of post-apocalyptic teen drama The 100 came to a shocking ending this week.
The finale of the CW series saw two beloved characters killed off while the rest managed to escape a nuclear bomb.
Fans are already looking forward to seeing what season six has in store for Clarke (played by Eliza Taylor) and Bellamy (Bob Morley) and the rest.
Here’s a look at the inspiration behind the much-loved series.
WARNING: This article contains spoilers for The 100 season 5 finale
Yes – The 100 is based on a series of novels.
Also titled The 100, the books are a series of young adult science fiction novels by author Kass Morgan.
There are four novels in the series, and the first is simply named The 100.
Book two is titled The 100: Day 21 and is followed by The 100: Homecoming and The 100: Rebellion.
The first book was released in 2013 and the last came out in 2016.
Although the series started off the same as the book, the two have diverged and become quite different from each other.
The season five finale closed with the title card: Book 1 End which appeared on screen after the last scene.
Showrunner Jason Rothenberg told IGN that the writers don’t take the books into consideration when writing the series anymore.
“In fact, they’re a totally different thing. Partially that’s because when I started, there was no book finished; it was, for the most part, a proposal for a book and synopsis of where it was going to go,” he said.
Both the show and the books start off with the same concept of the characters living on board a space colony after nuclear fallout on Earth.
The phrase ‘The 100’ refers to the 100 teen prisoners sent back to Earth to investigate if it is habitable.
But there are not many other correlations between the two.
Rothenberg added: “I created the pilot parallel to Kass [Morgan] writing the book and that’s why they’re so different.”
The series has now gone way beyond the books with the season five finale seeing the Earth destroyed for good.
Most of the show’s core characters were saved and went into a cryo-stasis with Clarke and Bellamy awakening 125 years later to find out that their ship was heading to a new planet and continuing the human race.
So fans have no indication as to what will happen next season as the source material is a completely different entity at this stage.
In an interview with Hypable, Rothenberg revealed that season six is going to be “very, very different”.
“It’s a totally new world. Eligius III, and what’s become of them, is obviously going to be central to the story,” he said.
Season six is currently in production and due for release next year.
The 100 seasons 1- 5 are currently streaming on Amazon Prime Video