The 100 has released an ominous title for its season 2 finale.

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The CS series is currently preparing to film for episode 16, and actor Isaiah Washington (Jaha) dropped by twitter to give fans an updated on Tuesday.

"Finished reading #The100 Season 2 Finale Episode 216 - "Blood Must Have Blood Pt. 2" written by [series creator Jason Rothenburg]," Washington wrote. "They're not ready."

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Writer Aaron Ginsburg previously teased the upcoming finale and his ominous warnings are harbingers of a very bloody ending for season 2.

"It's so insane, and it's so big, and it's completely not what you would see on The CW," Ginsburg told the Nerdist Writers Panel (via Pop Insomniacs). "It's merciless. It's really, really merciless."

Considering the series closed out the midseason finale by brutally killing off one of its core characters, one can only imagine the bloodbath in store for viewers before the summer hiatus. The battle against Mount Weather is only just getting started, and it seems Clarke (Eliza Taylor) and her fellow delinquents will spend the next eight episodes fighting the Undergrounders.

Find out more when The 100 returns to The CW on Jan. 21. Click the video below to see a preview for the series' next episode, "Remember Me."