Shetland digs into Annie Betts past and unearths an old enemy.

Warning: contains spoilers for Shetland series nine episode five.

Heres a question: If you wanted to watch a London-set spy thriller, would you tune in toShetland?

Ruth and Tosh in Shetland series 9

Annie needed to get out of London because she missed the Shetland sky, she said.

Im right there with her.

Now we know whats behind his unusual interest in little Noah Bett.

Ashley Jensen wearing a white shirt and red tank top as DI Ruth Calder in Shetland series 9

Hes so ashamed of how he treated Annie that he sees solving her murder as a kind of reparation.

Noahs still the only witness to the shootings, and is the key to unlocking what happened that night.

Hes an unreliable witness, that poor wee bed-wetting mite.

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

And what should we make of his explosive outburst at Ian?

So much has happened: Ians arrest and attack.

The whole sad business with the Harris family.

Because they may need to restate their That could definitely have been a Zoom call policy.)

And now, the latest twist involvingKarin Jakobson, another spy, it turns out.

What are the chances?

Shetlandseries nine concludes next Wednesday December 11 on BBC One and iPlayer.