Season 1 ofThe 100brought war between The Sky People and Grounders, Season 2 united them against Mount Weather, and Season 3 was a war for the fate of all mankind. With the arrival of the first Season 4 trailer, the question now becomes, how will they fight when “the end is coming”?

Clarke (Eliza Taylor) helped destroy The City of Light and stopped A.L.I.E.’s plan to horde humanity within her reach, and now she’ll have to deal with those consequences. The last remaining power plants that weren’t destroyed by the initial bomb are melting down, and as the A.I. warned, 96% of the entire planet will become uninhabitable in about six months, heralding the signs of the nuclear apocalypse with black rain and pre-cancerous lesions.

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We also can’t ignore everyone who died last season. Octavia (Marie Avgeropoulos) has become a feral warrior called “Sky Ripper,” a transformation that no doubt stemmed from killing Pike for murdering Lincoln. Then there’s the death of Lexa, which caused quite the stir among the fandom. Clarke seems to find herself back in a position of power, which is never an easy role for her to take on. How will she lead her people when many of them appear to be falling apart at the seams?

Watch the new trailer below:

What began rocky has since smoothed out into one of the most thought-provoking pieces of sci-fi the genre has to offer, and the network has since opened up to the greatness ofThe 100, despite the controversies over last season’s events: the death of Lexa sparked a conversation about LGBTQ characters, while actorRicky Whittlelet his grievances with showrunnerJason Rothenberg. Those have both died down, with Whittle getting a new role on Starz’sAmerican Gods.

Season 4 ofThe 100returns to The CW on February 1 at 9 p.m. Here’s the official synopsis:

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For three seasons, THE 100 have fought to survive. That fight has torn them apart, turned them against each other, and taken the lives of their closest friends. In season three, our heroes found themselves at the epicenters of both the Grounder world and the struggle for Arkadia’s soul. Despite their best efforts, all out war appeared unavoidable until a new, even more dangerous threat, one that had been quietly rising all along, exploded to the surface: ALIE, the A.I. that ended the world, offered relief from pain and eternal life in the “City of Light,” but as her ranks grew, it quickly became clear that she was building an army dedicated to controlling all sentient life on Earth. This was no longer a battle between warring factions; it was a fight for humanity itself. Now, in the wake of the epic season three finale, a hard truth lands on the shoulders of those who remain. What’s left to fight for now? Will they go quietly into the night, or will they find hope and faith in each other, as they face their darkest chapter yet?

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