[s2e1] The Time Of Two Engines -

: Melanie finally confronts her long-lost daughter, Alexandra Cavill (Rowan Blanchard), who has been groomed as Wilford’s protégé during their seven years apart.

: Mr. Wilford demands a seemingly random list of supplies—including beer, eggs, and boots—threatening to let both trains freeze to death if his orders aren't met. [S2E1] The Time of Two Engines

: The episode transitions the physical war of Season 1 into a tense diplomatic and psychological "Cold War" between two opposing engines that must now cooperate to survive. Alexandra Cavill (Rowan Blanchard)

: While outside the train to investigate the docking, Melanie Cavill (Jennifer Connelly) manages to infiltrate Big Alice . When Wilford orders the trains to uncouple and leave Snowpiercer to freeze, Melanie triggers a "sticky charge" that fuses the two trains together permanently. [S2E1] The Time of Two Engines