Zurich (Part 1) aired on BBC Radio 4 on December 23rd 2014 and starred:
- Benedict Cumberbatch as Martin
- Roger Allam as Douglas
- Stephanie Cole as Carolyn
- John Finnemore as Arthur
- Anthony Head as Herc Shipwright
- Dan Tetsell as Karl
- Timothy West as Gordon Shappey
- Matilda Ziegler as Princess Theresa
- Jonathan Kydd as the Auctioneer
The episode has a pre-credits sequence of a slightly different reprise of the ending to Yverdon-Les-Baines, some of the wording is different and Athur is missing his Dwagon Fwoo lisp. The episode actually opens where this left off, with Martin trying to weasel his way out of admitting he got the job. Theresa comes running up and hugs Martin, congratulating him on getting the job. As Martin has the job, Carolyn fires both Martin and Douglas on the spot. Martin gives Arthur his old fan, as he can't take it to Zurich. They return back to Fitton to tie up loose ends.
Douglas gets a new job delivering papers by plane. He doesn't like it because he has to work and unload the plane. There's only 30 minutes turn around to get the job done. Back in Fitton, they're cleaning out the portacabin one last time. Arthur shows up in Martin's van, having turned it into an Ice Cream van. Everyone at Fitton airport is saddened that GERTI is taking off one last time as she's headed for auction.
GERTI is on the auction block. Martin joins in the bidding to keep interest when Gordon shows up and bids £15,000 for it. Carolyn and Gordon end up in a bidding war over her, when Arthur jumps in and yells "10 MILLION". When it comes to payment, Carolyn informs the auctioneer that the bids were merely stooge bids and it should really go to Bruce the scrap metal dealer. Douglas believes there's something valuable on the plane, that's why Gordon was willing to pay a quarter of a million pounds to get GERTI back. This prompts everyone to go after GERTI and get her back and to find out what Gordon may have hidden on her that they missed for 13 years.