Phyllis Logan and Chelsie

A second, almost Jake-less second season saw the ex-con Max, his old life gone, embroiled in a vengeful battle with the intimidating Roy and his even more intimidating wife, Maggie, a cardigan-wearing cobra played with calm relish by a magnificently against-type Phyllis Logan.

As we rejoin it for the last death-waltz, Guilt is still skulking stealthily around Edinburgh’s underbelly. Maggie Lynch is still holding meetings, ie conversations where she threatens to kill someone, either in the city’s fanciest rooms or in disarmingly beautiful pockets of post-industrial wasteland.

Despite that, Phyllis Logan is the perfect antagonist: omniscient and omnipotent in the manor she runs, with a jagged personal brittleness beginning to poke through her armour. Opposite her, Bonnar has never been better in a role that lets him display his two great strengths – hypnotic charm and snarling, desperate malevolence – at the same time. They have made Guilt’s trip around Edinburgh’s dark corners a rare thrill.

Guilt is available on BBC iPlayer and airs on BBC Two in the UK from 27 April, with an Australian screening date to be confirmed.