Episode 7

As Fortitude begins to come to terms with Stoddard's death, Morton begins his investigation to found out who was responsible for the murder of Pettigrew. After visiting the research centre, and speaking with lab technician Max Cordero, he decides to track down Yuri Lubimov, whom he is certain holds vital information on the case. Shirley Allerdyce's health continues to deteriorate, but Markus is blissfully unaware as he continues his quest to make her 'more beautiful by the day'. Lubimov suggets to Morton that Eric was responsible for Pettigrew's murder, and that his police colleagues have suppressed evidence in order to protect him. Henry Tyson has a flashback and realises that he took a picture at the scene of Pettigrew's murder on his camera. Shirley's illness overcomes her, leading her to brutally attack her own mother, and leave her for dead.