What is the key to taking Alie down?
That was finally revealed on The 100 Season 3 Episode 12 when Octavia's thirst for answers took her to a clue that could help return the world to its former glory.
Meanwhile on this exciting post-apocalyptic drama, Jaha made his way to Polis, but did he get the warm reception he expected?
Also, Murphy's relationship with Ontari continued to blossom, but did her big secret drive a wedge between them?
Use the video above to watch The 100 online to get up to date with the latest from this addictive CW series.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.