Snowpiercer's season 3 finale, titled "The Original Sinners," delivers a
satisfying conclusion to the central conflict while leaving the door wide open
for future drama. The episode picks up right where the previous one left off,
with the train on the brink of civil war due to the clash between Layton's
optimistic vision of New Eden and Melanie's pragmatic concerns about its
viability.
The episode acknowledges the shared responsibility for this chaotic situation, aptly reflected in the title "The Original Sinners" referring to both Melanie and Layton. Melanie's decision to expose Layton's lack of firsthand knowledge about New Eden fractured the fragile unity onboard.
Wilford, ever the opportunist, thrives on this discord. He establishes himself in the Night Car, further polarizing the passengers and forcing them to choose sides. The episode throws in a surprising twist with the return of Bojan "Boki" Boscovic, presumed dead in season 2. He replaces Icy Bob as Wilford's bodyguard, adding another layer of unpredictable danger to the Wilford faction.
The climax revolves around a tense standoff between the three factions – Layton with the Brakemen, Melanie with control of the engine, and Wilford with his loyal followers. While Layton boasts manpower, the Brakemen seem hesitant to fight their fellow passengers. Wilford's group is smaller but possesses formidable figures like the newly returned Boki.
The episode explores the possibility of a compromise. Melanie attempts to negotiate with Wilford, but his chaotic agenda prevails. Both leaders, fueled by ego, refuse to budge, believing they hold the key to saving everyone.
The most intriguing plot point involves Wilford's removal. Initially, it appears Melanie might strike a deal with him, but the plan takes a surprising turn. They exploit Wilford's paternal blind spot, using baby Lyanna as leverage to force Layton's hand. Knowing Melanie's empathy, Layton backs down, preventing another parent-child separation.
Wilford's demise, however, feels a little too convenient. Blinded by his self-importance, he falls for Melanie's trap. Instead of killing him, they offer him the same suspension drug experience Melanie endured. He is essentially ostracized and sent on his way, leaving the question of his permanent removal unanswered.
The episode concludes with a symbolic act of unity – a physical separation of the train. Passengers are offered a choice: follow Layton on his risky journey to New Eden or remain with Melanie on the potentially failing Snowpiercer.
Heartfelt goodbyes punctuate this emotional farewell. Alex and Melanie share a poignant moment, highlighting the strength of the show's character-driven moments. Javi's decision to join Layton's group feels somewhat underdeveloped, lacking a clear explanation beyond the need for another engineer.
The romantic subplot concludes on a positive note. Josie finally sheds her contrived reservations and embraces Layton. However, not all relationships end happily. LJ's potential demise (possibly choking on her father's fake eye) feels unresolved, leaving the door open for her return.
The final sequence offers a glimmer of hope. Big Alice successfully traverses a rickety bridge, reaching the supposed warm spot. The relieved faces of the passengers bathed in sunshine portray a temporary victory.
But the victory is short-lived. A final scene flashes forward three months, revealing an ominous missile explosion on the horizon. This cliffhanger leaves viewers wondering who is behind this attack and if the fight for survival is far from over. The season ends with a bang, promising more action and intrigue in the seasons to come.