It’s all getting a bit sci-fi at the midway point of Shetland series nine.

Warning: contains spoilers forShetlandseries nine episode three.

Billy, get me everything you might on this new marine lab, requested DI Calder in episode three.

Ian Hart standing next to a shelf of vinyl records in Shetland series 9

Just what is pluripotency expert (thank you, freeze-frame) Dr Mohan doing in that remote laboratory?

Genetically engineering a new species of cold-resistant detectives to replace our shivering duo?

Splicing frog and dinosaur DNA to turn Shetland into a new Jurassic Park?

Calder and Tosh from Shetland with newcomer to the Isles Ms Jakobson in series 9

Perfecting the recipe for the ultimate shortbread biscuit?

Whatever Mohan is up to, its part of series nines heightened twist onShetlands usual investigations.

The bond shes slowly building with Noah may prove vital if he remains the only witness to the murders.

Alison O’Donnell as Tosh and Ashley Jensen as Ruth in Shetland season 9

Rossis interest in the boy must be down to his status as a witness.

He wasnt the only one dinging alarm bells.

The Harris family are already a tragic bunch, and John accidentally killing his youngest only adds more pain.

Poor Fergus was the sweetest of that already-sorry lot.

Shetlandseries nine continues on Wednesday November 27 on BBC One and iPlayer.