As the anomaly reveals its true nature, warring factions and new, unimagined dangers jeopardize Clarke's race to establish peace once and for all.

1. From the Ashes 42m Volatile schisms subvert Clarke's first efforts to rebuild Sanctum. Hope helps Echo and Gabriel track an invisible foe in a frantic hunt for Bellamy.

2. The Garden 42m Time moves in mysterious ways through the anomaly, where Octavia makes a breakthrough discovery and — much later — so does Gabriel.

3. False Gods 42m Russell's followers foment violence as he prepares to meet his fate. Meanwhile, a faulty nuclear reactor endangers all of Sanctum.

4. Hesperides 42m Using time dilation on the anomaly's far side, Hope, Echo and Gabriel prepare for an attack on Bardo. Clarke hazards a deal with the Disciples.

5. Welcome to Bardo 42m Octavia gets a punishing welcome to the marvels of Bardo, while Indra tangles with fanatics in Sanctum and makes an unnerving discovery.

6. Nakara 41m Diyoza fights to escape imprisonment on Bardo, Indra confronts growing hostilities in Sanctum, and Clarke's team stumbles into trouble on a new world.

7. The Queen's Gambit 41m Murphy plays a tense game with Russell while Emori lays plans to heal the fractures in Sanctum. Diyoza and Hope have a reckoning on Bardo.

8. Anaconda 42m Not long after Earth's nuclear apocalypse, Becca unravels the Anomaly Stone's code, and the original Grounders spark a rebellion against Second Dawn.

9. The Flock 40m Consenting to train as Disciples for a coming war, Diyoza and the others learn the secrets of Bardo. A hostage crisis forces a showdown in Sanctum.

10. A Little Sacrifice 42m In the wake of a bloody massacre in Sanctum, Sheidheda tries to snatch control from Indra. Meanwhile, Echo devises a devious plan on Bardo.

11. Etherea 42m Seeking passage off a mysterious world, two travelers fight their way up a treacherous mountainside — and make a momentous discovery along the way.

12. The Stranger 42m While Sheidheda launches a violent purge in Sanctum, the Shepherd's newest convert strikes a deal: locate the Flame to save the lives of his friends.

13. Blood Giant 41m The Shepherd assails Sanctum to force Clarke to retrieve the Flame. An eclipse revitalizes an old menace. Gabriel has a breakthrough epiphany.