VIDEO: Sneak Peek of 'The 100's Premiere Episode - WATCH NOW

The 100 premieres tonight on The CW, and it’s really intense.

The fourth season picks up right where we left off. Clarke has just learned the human race is doomed to face an unbeatable enemy. Alie was telling the truth. The remaining nuclear reactors on Earth are melting and will set the atmosphere on fire.

The good news is, we can ease you into it with a teaser from the premiere.

And catch the full episode tonight on The CW @ 9 PM ET/PT.