A direct continuation of the Season 1 cliffhanger. The Mountain Men harvest Grounder bone marrow and blood to survive outside. Clarke must make impossible choices – including genocide – to save her people.
A second nuclear meltdown (Praimfaya) will destroy Earth again. The race to save humanity leads to the bunker, the Ring, and the heartbreaking "we're back, bitches" goodbye. Clarke is left alone on a scorched Earth.
Fog of War, Blood Must Have Blood (Parts 1 & 2) Season 3 – ALIE & The City of Light Episodes: 16 Theme: Artificial Intelligence & Free Will The 100 Season 1 2 3 4 5 6 7 - threesixtyp
Six years after Praimfaya. Clarke raised Madi in the valley. Octavia becomes Blodreina. The arrival of Eligius prisoners reignites the war for the last green land on Earth. The season ends with Earth's final destruction.
Thirteen, Terms and Conditions, Perverse Instantiation (Part 2) Season 4 – Praimfaya Episodes: 13 Theme: Sacrifice & Second Dawn A direct continuation of the Season 1 cliffhanger
Die All, Die Merrily, The Chosen, Praimfaya Season 5 – The Dark Year Episodes: 13 Theme: Parenthood & Betrayal
The flame, nightbloods, and the AI ALIE threaten to erase human emotion. Lexa's leadership, Pike's xenophobia, and Lincoln's tragic fate define this season. The finale introduces the "City of Light" – a digital prison. A second nuclear meltdown (Praimfaya) will destroy Earth
The final season reveals the Anomaly as a bridge between planets and potentially higher beings. The Disciples of the Last War, Cadogan, and the final test force every character to answer: Is humanity worthy of transcendence?