Writer Simon Donald discusses the making of series two of Fortitude, the acclaimed Sky Atlantic thriller set in the arctic circle. Series 2 will see Dennis Quaid, Parminder Nagra, Michelle Fairley, Robert Sheehan, and Ken Stott join the cast.\n\nThe first series of Fortitude is Sky Atlantic\u2019s biggest drama commission to date, with the premiere episode having been watched more than 3.2 million times so far. It was not only a huge hit with Sky Atlantic customers but around the world, where broadcasters in more than 170 territories bought the drama.