Season 4 of CW’s The 100 is just around the corner, and we have everything that you need to know before its return!

Season 3 ended on a less than hopeful note. A.L.I.E. was defeated. The City of Light was destroyed. Everyone was saved — or at least they thought they were. With the pulling of the lever came an entirely new kind of doomsday prophecy, and the characters now face a threat unlike any they have faced before. It is not one that you can simply kill or easily defeat. How do you survive in a world that will be uninhabitable? If the trailer is any indication, surviving won’t be easy.

Considering that that is only the trailer, we aren’t expecting happy times and rainbows. None of the characters are going to have it easy. Octavia will be struggling in the wake of Lincoln’s death, and, just as Bellamy had turned his pain of losing Gina into something much darker, she will do the same. She becomes the “Sky Ripper, death from above,” and, if that doesn’t sound terrifying, then I don’t know what does. (Bonus points if you noticed that her war paint is a replica of Lincoln’s tattoos).

Characters will be dealing with the loss of the idealized life they had gained in the City of Light and will be forced to face themselves in the wake of the actions they committed under A.L.I.E.’s influence. They will be subjected to an entirely new kind of pain, and how they deal with that pain will vary. Other characters, like Monty, will be dealing with what they lost in the City of Light. While he never took the chip, he was forced to kill his own mother because of it.

To top it all off, everyone will have to face the threat of the world’s nuclear power plants melting down, and it seems that Clarke will be taking the brunt of that frustration. She is the one who subjected them to that when she pulled the lever. But this is Clarke Griffin that we’re talking about, and she always figures out a way to save her people.

The CW / Entertainment Weekly

In casting news, Season 4 will also see the introduction of Ilan, a Grounder portrayed by actor Chai Romruen. While little is known about the character, showrunner Jason Rothenberg teased that “He was forced to do some horrible things while being driven by A.L.I.E. He’s dedicated to making sure that never happens again.”

Zach McGowan, who made his appearance as Roan in Season 3, has also been promoted to a series regular, so expect to see more of the King of Azgeda.

Season 4 of The 100 premieres on The CW Wednesday, February 1 at 9:00pm ET/PT.