Haunting show with a spiritual dimension

DS Jackie ‘Stevie’ Stevenson (Nicola Walker) and DI John River (Stellan Skarsgård) are racing around London trying to solve the mystery of who killed… DS Stevenson. Yes, River sees dead people, or believes he does, which amounts to the same thing really. Walker and Skarsgård are brilliant together, and Adeel Akhtar is great as River’s very patient new partner. This is a terrific, atmospherically noirish drama, Bafta-nominated back in 2015. Along with River’s quest for justice we also get a penetrating study of grief. Britbox, from Thursday