SHETLAND, Season 4– SERIES (NR) Award-winning crime writer Ann Cleeves bestselling detective series returns for a fourth season as DI Jimmy Perez (Douglas Henshall, Primeval) faces a gripping new single mystery. When Thomas Malone has his murder conviction overturned after 23 years behind bars, DI Perez has to reopen the investigation If Thomas Malone didn’t kill local teenager Lizzie Kilmuir 23 years ago, who did? Welcome back to Scotland’s breathtakingly beautiful Shetland Islands, where re-opening a teenager’s cold murder case from 1994 triggers a new chain of killings and attacks. Good-natured DI Jimmy Perez (Douglas Henshall) and his bright young DS, “Tosh” MacIntosh (Alison O’Donnell) investigate the apparent copycat murder of a local journalist, killed while collecting clues about corporate manslaughter and its cover-up. Why does the Secret Service warn Perez and Tosh off the case? And who shot their prime suspect?