Baz goes missing, crew split to find him. Rose isolates Fulmer. Power failures, paranoia hit as they discover unsettling things during the manhunt for Baz amidst Rose's breakthrough.
Baz, Garrow explore pump control room, realizing Fulmer's help is needed. Fulmer suffers mentally. Crew's hope turns sour, Magnus loses control as tensions escalate.
New arrivals scheme to seize control from weakened leader Magnus. Their motives questioned, crew urgently seeks truth as lives hang in balance amid power struggle for pump control.
Coake reveals Pictor's plan and mission purpose. Rose and Fulmer decipher coded messages' meaning. Magnus confronts personal issues while leading crew's final survival effort. Scores settled, mysteries unveiled.
