By the end of the episode, only about a dozen core cast members remain alive on the ship: (The investigators) Daniel (The mysterious coder) The Boy / Elliot (The focal point)
The final minutes of "The Calling" provide massive lore drops setting up the rest of the season. 1899 s01e05
Daniel uses a handheld sliding puzzle device (the machine) to hack the ship's wiring and successfully power it down, stopping the hypnotic ticking. By the end of the episode, only about
The Purge: The Ticking Noise