When Jane, Lucy and Amelia take Jane's mother (Felicity Montagu) out for a birthday meal they're not expecting to be thrust into their most dangerous adventure yet, but that's exactly what happens. After failing to decide on a starter and then moaning about her husband's obsession with ladies tennis, Jane's mum casually drops into conversation the fact that her new Russian cleaner has some inside info on a recent high-profile diamond heist.

Jane drags the name Yuri Chekov (Anil Desai) out of her and then heads to the airport immediately with an amorous Lucy and a vodka-swilling Amelia in tow. It is very cold in Russia. Amelia is glad of her vodka as well as her furry hat - a live raccoon called Craig.

Lucy is keen to warm herself up using other means and the bearded stranger staring at her from the other side of the arrivals lounge seems like as good a place to start as any. Jane just wants to grab her bag from the carousel and get after Chekov but the fact that Amelia grabs it for her means that Jane's not in a position to wonder why the bag's got a lot heavier during their flight.

Written by Anna Emerson, Lizzie Bates and Catriona Knox
Audio production by Matt Katz

Produced by Dave Lamb and Richie Webb
A Top Dog Production for BBC Radio 4. Show less