8. Anaconda

Complete story — includes the ending

This episode's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. ( September 2020 ) ( Learn how and when to remove this message ) On Earth pre-apocalypse, Cadogan's ex-wife Grace and daughter Callie, who created the Grounder language as a child, flee to the Second Dawn bunker as nuclear Armageddon strikes. Having discovered the anomaly stone underneath the Temple of the Sun in Machu Picchu, Cadogan focuses solely on opening a door to another world rather than finding a way to retake the surface of the planet. Two years later, Becca arrives from Polaris and using the Flame, is able to open the portal to Bardo; although Becca insists on using Nightblood to retake the surface instead, Cadogan is adamant about leaving. While bonding with Callie, Becca discovers the stone code leading to what she calls Judgment Day, the true end of the human race; Cadogan has her locked up for refusing to cooperate further and then burned at the stake to get the Flame. Informed of the AI's significance by Becca, Callie steals back the Flame and leaves with people she has convinced to take Nightblood, bringing with them enough Nightblood to save 2,000 more people. Grace is exiled for helping them and Callie's brother Reese and another cultist Tristan, both Nightbloods, agree to chase after them to retrieve the Flame; once they are gone, Cadogan leads his remaining followers to Bardo. In the present, Cadogan reveals that the Flame is the key that they seek and Clarke claims that Callie's mind has survived. Cadogan brings in Octavia, Diyoza and Echo, all apparently fully brainwashed into the Disciple cause.