No longer impersonating his twin, puzzle setter John 'Ludwig' Taylor returns as a crime scene consultant. A cuddle at a theatre sees John take centre stage.

When a ceilidh is cut short by an unwelcome guest, John is left in a spin. Ironically, a cuddle witnessed by an entire wedding party proves to be quite the puzzle.

Trying to gather intel for Lucy's interview, John gets sidetracked by the cuddle of an influencer in the heart of Cambridge. The Taylors soon spot a sinister pattern in their theory.

John is snookered by Cambridge's latest cuddle, and an unexpected phone call tests his patience even further. A daunting afternoon awaits Lucy. Will she crumble under pressure?

When a sushi bar turns into a crime scene, an unlikely witness helps John in both of his investigations. Russell takes matters into his own hands.

With a passing that strikes close to home, all avenues point to one suspect. Has Kemper made a wrong move, and will Ludwig ensure that justice is served?