Frank takes the law into his own hands in a bid to clear Liam's name, while Morton realises Henry may have vital information about Pettigrew's death. A polar bear carcass arrives at the research centre's lab and as Vincent and Natalie analyse the corpse, they develop a theory about the recent events in Fortitude, which they feel compelled to share with Hildur and Dan
Elenco: Richard Dormer , Sofie Gråbøl , Verónica Echegui , Sienna Guillory , Luke Treadaway , Darren Boyd , Mia Nielsen-Jexen , Björn Hlynur Haraldsson , Alexandra Moen , Björn Hlynur Haraldsson , Alexandra Moen , Michelle Fairley , Parminder Nagra , Robert Sheehan , Ken Stott .