In the third season, we have a series of different events that we live in. The investigation between Peres and Touche leads to Glasgow, where they hope to uncover the truth behind Maguire's death and his relationship with Robbie Morton. As the situation gathers, Perez, Sandy and, most importantly, Threatened. On the other hand, Tosh reappears to investigate the new direction, raising further questions about events in Shetland and Glasgow.