Yverdon-Les-Bains aired on BBC Radio 4 on 13th February 2013 and starred:
- Benedict Cumberbatch as Martin
- Roger Allam as Douglas
- Stephanie Cole as Carolyn
- John Finnemore as Arthur
- Anthony Head as Herc Shipwright
- Nicholas Woodeson as Oskar Bider
- Kate Duchene as Captain Deroche
There is no pre-credits scene. The episode opens with Martin receiving a letter from Swiss Airways asking him to go to Yverdon for an interview. This happens at the same time the wallchart says that they're taking Mr. Alyakhin yacht shopping. At the airport, the rest of MJN give Martin the last minute support he needs before he catches his flight to Yverdon.
Back in Fitton, Carolyn has gotten around the lack of pilots issue by bringing Herc onboard to act as Captain, while Martin's in Switzerland, which causes friction between them. Meanwhile, Martin undertakes his exam and starts getting flustered about his skills. Back on GERTI, Douglas has a crack at the cheese tray, while Herc eats from a fruit tray, Arthur tries dragon fruit and his lips start swelling up, proving he;s allergic to Dragon Fruit, as well as strawberries,
During Martin's interview, Oskar Bider, the CEO of Swiss Airways enters and oversees the interview. They believe he's cheating, but they find out that Martin had memorised the entire manual, scored adequate on the simulations, yet 100% on his test. They push him to break the rules, but he doesn't budge and sticks by the book. Meanwhile, on GERTI, Douglas starts turning into Martin, especially when he refers to himself as "the commander of this vessel". He realises exactly what Martin goes through every day,
In the final stages of the interview, he breaks down and tells them the truth, on how he's a pilot, but not a very good one, but knows the rules inside and out. At the airport, he meets with Arthur and he tells him that Swiss Airways offered him the job. He doesn't want to leave out of loyalty to MJN, but Arthur reminds him that Carolyn will make him go. He tells the others at MJN that they'll let him know.