'The 100': The 26 Biggest Reveals From the Season 4 Trailer

"From the ashes, we will rise."

The 100 is setting up a world-destroying apocalypse again, but not all hope is lost for most of the characters in The CW's sci-fi series. The first trailer for season four (watch it above) reveals that what corrupt A.I. ALIE (Erica Cerra) warned about in the season three finale is actually coming to pass: The nuclear power plants on Earth are melting down and soon enough, the planet will become uninhabitable again as it did 100 years prior when she set off all the nuclear bombs to wipe out Earth's population.

But the dark and ominous footage reveals that despite the death sentence placed upon everyone, Clarke (Eliza Taylor), Bellamy (Bob Morley) and the rest of the Skaikru and Grounders aren't done fighting for their survival. From the heart-stopping action to shocking new hookups to potential fan-favorite deaths, The Hollywood Reporter rounded up the 26 biggest reveals from the three-minute first-look trailer.

0:00 - "The end is coming." ALIE's warnings weren't just a last-ditch effort to get Clarke on her side. We see Grounders all over the world starting to suffer and die from the radiation coming off the nuclear power plant meltdowns.

0:18 - "The black rain will come first. There will be no drinkable water. Precancerous lesions will form. Death is inevitable." Even Clarke begins to see the first signs that the second apocalypse is already here when a Grounder develops the horrifying effects of radiation right before her eyes and the death toll around her rises. Are any of those wrapped-up bodies being taken out of Arkadia friends or allies of hers? Is season four going to be the deadliest season yet?

0:46 - What has Raven (Lindsey Morgan) gotten herself into? She is seen trying to run — struggling with her injured leg — through the woods away from gunfire, shouting, "Run!"

0:51 - It seems as though Octavia (Marie Avgeropoulos) hasn't escaped consequences for her actions in season three as she fights for her life against what looks like an Azgeda Grounder warrior.

0:54 - At least Murphy (Richard Harmon) is still getting lucky, even with the impending apocalypse coming for everyone. He's still with his Grounder crush Emori (Luisa D'Oliveira) and is seen kissing her with his shirt off somewhere inside Arkadia. Is it even possible that Murphy might have found true happiness after all he's been through on Earth? Later in the trailer, she begs him to "survive, please." Their relationship is more than just a physical one, and it's something he desperately needed.

0:56 - Are there more Arkadians on Earth? Bellamy and his search team happen upon a piece of the Ark that seems to have landed inside Azgeda borders. If there are any survivors, it would be a miracle for them to have lasted this long outside of Arkadia.

0:58 - "I know you're afraid," Clarke says throughout the trailer. "I know you're angry. But if we stick together, we won't just survive. We'll thrive." This is a far cry from where the 100's leader began last season, alone and angry at the world. Now she is doing her best to rally Arkadia against the coming apocalypse. But after all she did last season, will they listen to her?

0:59 - At least she now has a potential ally in the Azgeda king Roan (Zach McGowan). But he's seen here leading his massive army toward Clarke, with his archers loading their bows, ready to attack her while she stands alone facing them. Is the Skaikru/Azgeda war back on?

1:05 - The actions of season three have really taken a toll on the once happy-go-lucky Monty (Christopher Larkin). He used to blindly follow Clarke and accept her orders without question, but now he's not only questioning her actions but also her intentions. "You're the one going too far and using the same old justification: 'It's all for my people,'" he angrily tells her before losing it. With the clock ticking down, now is not the time for dissension in the ranks, but after Monty was forced to kill his own mother, there's no telling how far he'll go in his grief.

1:08 - Is that Luna (Nadia Hilker) dying from radiation? As the only person left alive who can take the Flame to become the new Grounder leader, if she dies, the the Grounder culture dies with her. Hopefully the Skaikru can find a cure for the radiation before all hope is lost for life on Earth.

1:15 - Bellamy has finally learned his lesson that every life is worth saving. He did what he thought was right last season following Pike (Mike Beach), but ended up massacring hundreds of Grounders in the process, and now he's committed to saving as many lives as he can. When Grounders attack, however, all bets are off.

1:20 - Is Roan going to have to defend his right to the Azgeda crown? He is seen fighting another Ice Nation Grounder in hand-to-hand combat, just as Lexa (Alycia Debnam-Carey) did when his mother challenged her as leader of the Grounders. With Roan, he's the devil Clarke knows, so another Grounder taking leadership over the brutal Ice Nation could lead to disaster for Skaikru.

1:25 - Jaha (Isaiah Washington) is back, and he's also reeling from the consequences of his actions in season two. After setting ALIE loose upon his people, it seems as if he feels the guilt and remorse over all the death and pain he caused. He's rocking a shaved head and counseling someone over how the decisions you make "wittle you down, piece by piece," just as Octavia is laying bloody and shell-shocked as a Grounder screams in anguish over his slain family. Is this foreshadowing for Octavia?

1:30 - Who is Kane (Henry Ian Cusick) trying to protect? He's desperately fighting off either Grounders or a Skaikru mob, threatening to kill the next person "who touches this man." Another Skaikru member tries to reason with him that they "can't kill [their] own people," but he claims he's "trying to save them." Do we have another Pike situation on our hands? Yikes.

1:38 - Confirmed: Octavia is not done getting her revenge for losing Lincoln (Ricky Whittle). To her, justice and revenge are the same thing, and throughout the trailer she is seen alone, fighting and killing. Roan even tells her former mentor Indra (Adina Porter) that she is becoming known as a Skairippa, "death from above." Indra replies — sarcastically? — with "I'm so proud."

1:47 - Who is this Grounder whispering in Roan's ear? She promises to help him do what his mother and Ontari (Rhiannon Fish) never could: Rule everything. Maybe Roan isn't the ally Clarke believes him to be after all.

1:55 - Here's the scene that will get the fandom talking. Bellamy gives emotional support to Clarke by putting his hand on her shoulder, and she grabs his hand and rests her head on it. It may not be as happy as their "Bellarke" reunion hug was in seasons prior, but it's definitely a sign of hope that these two are finally back on the same page and able to lead their people again. Later in the trailer he tells her that he still has hope because they're "still breathing."

2:02 - Is Octavia wearing the face paint and clothing of an Azgeda warrior?! Later in the trailer she's shown severely hurt, so her actions could be leading her down a path from which she can't return.

2:06 - "First we survive, then we find our humanity again," Abby (Paige Turco) says before leaving somewhere on a boat with other Skaikru members. Looks like she is still operating under the "maybe there are no good guys" mantra she adopted last year.

2:10 - They may not be happy, but at least Monty and Harper (Chesley Reist) are still together.

2:12 - While his best friend is at the darkest place he's ever been, Jasper (Devon Bostick) has done an about-face from where he was last season and is finding the joy in life again. While everyone else is trying to find a way to survive, he just wants to live. Seeing Jasper with a big smile on his face almost seems wrong, but he clearly learned his lesson from ALIE last season.

2:16 - Abby and Kane kiss! Hopefully for real this time.

2:19 - Could there be another Grounder besides Luna who can take the Flame without dying? An unknown Grounder is seen praying with the Flame. Is she a Nightblood?

2:27 - While Indra's fate was left up in the air at the end of season three, it's clear from this trailer that she's alive. Here she is seen finally being taken down off the cross that ALIE had her nailed to in he finale. It'll take her some time to heal from her injuries but as of now, she's surviving.

2:35 - While there are a lot of quick flashes that show all the characters in dire circumstances with the tagline "From the ashes, we will rise," there is one that shows Jaha laying on the ground with his eyes closed. Is he just resting, or will season four be his last?

2:44 - And don't stop the trailer until you've seen the final shot after the credits roll, as it looks like Clarke's days might be numbered as well. She's seen suffering the brutal effects from the radiation ALIE warned her about. Either Skaikru needs to find a cure for this radiation, or someone is having a horrible dream about losing Clarke, or the Skaikru might actually lose their only hope of surviving the next apocalypse this season.

The 100 season four premieres Wednesday, Feb. 1, at 9 p.m. on The CW.