Has a newly-released murderer struck again on the remote isles?

If you have murder mystery fatigue, don’t worry – Shetland returns tonight with a pithy six-part series, which is the TV equivalent of a bracing sea wind. Feelings are running high on the islands when Thomas Malone is acquitted and released from prison after serving 23 years for the murder of Lizzie Kilmuir.

When another young woman is killed shortly after Thomas’s return, Jimmy (Douglas Henshall) finds himself simultaneously investigating a cold case and a shocking new one…

Broody and thoughtful, Shetland relies less on graphic violence, preferring tension and suspense. Sean McGinley and Stephen Walters guest star.

Please note, this programme airs at 10.40pm in Wales.