'The 100' Showrunner Teases That Tonight's Season 5 Finale Is 'Game-Changing'

Octavia stands behind Madi in this still from the season five finale of The 100.

In tonight’s episode, Clarke (Eliza Taylor) and her friends must risk everything to fight one last battle for survival, only to glimpse an even darker threat to the last living valley on earth.

Jason Rothenberg opened up to TVLine about the final moments of the episode, revealing that no one will be prepared.

“All of the pieces are in place for another epic, game-changing — in many ways — finale,” he shared. “We’ve set up a situation where there are two armies fighting over the last survivable land.”

“If they can’t figure out a way to make peace, or to overcome the human instinct to not make peace, they risk destroying that last valley. The fate of the planet literally hangs in the balance.”

The 100 airs TONIGHT, August 7th @ 8PM ET/PT on The CW.