Kuala Lumpur aired on BBC Radio 4 on 14th August 2009 and starred
- Benedict Cumberbatch as Martin
- Roger Allam as Douglas
- Stephanie Cole as Carolyn
- John Finnemore as Arthur
- Paul Putner as Dave
- Roger Morlidge as George
The episode begins with a pre-credits sequence of GERTI landing back in Fitton. Karl welcomes them back. Martin notes he spotted a hawk or kestrel on the approach. Karl asks what's it doing. Douglas replied "watching how it's supposed to be done"
The episode opens with Arthur and Carolyn inside GERTI after it's been shut down and is now on standby for the rest of the week. Arthur wants to borrow Carolyn's car, as his is really old, it's the wrong colour and smells of duffel coats. Carolyn makes him a bet. If he can use this week to get his skills up on stewarding from very bad, to merely bad, she'll let him do so. Carolyn will be her mystery passenger. Martin comes in and wants to use part of the portacabin for a pilot's lounge. Carolyn rebuffs him and tells him that if he can find space in the airfield, he can use it as a lounge.
Martin goes out looking for a potential spot to make his pilot's lounge. Unfortunately, the planes he finds are locked. Arthur reminds him of a scrap DC-10 fuselage out the back of the Hangar. They agree it's a good idea and go to check on it. As they get closer, Martin hears voices coming from inside. Martin is shocked to find there's an illegal bar operating on the airfield and has been there for 3 years.
Martin threatens to have the pub shut down, Douglas remarks how he would have had it shut down anyway, even if he had known about it. Douglas tells Arthur the reason he hasn't been told is that he's the worst liar ever. Douglas proves it easily and reminds him of a secret to lying. "telling a different truth". Arthur is called to GERTI and then Martin threatens to come back that night and have the pub shut down,
Back onboard GERTI, Arthur goes through his first day of training. He can't lie to his mother, Carolyn and then wants to go to Kuala Lumpur, but it shot down by Carolyn saying she doesn't want to hear about Koalas or Oompa Loompas. Arthur is quiet and then trains on how to deal with passengers wanting to smoke, which goes OK, but he needs to write down what can be smoked on board, which is nothing.
Martin goes into the bar and realises that it's not what he expected. He realises that they respect him and that spurning them would cause problems. He does however find that the house rules and the talk is not what he expected. He can't talk about flying, so he is forced to talk about other things, including sport. which he's unaccustomed to. This descends into a point where he considers quitting and the fact that he buys rounds allows him to talk about aviation, which makes everyone leave.
Meanwhile, Arthur goes through several trying days of working through orders, food menus, special diets and multiple things at once. On the final day, when Carolyn throws the book at him, he invents his own way through it by inventing his own mystery passengers to fix the problems Carolyn throws at him. Carolyn is impressed by his ingenuity and gives him the keys to her car.
Martin finds out that Douglas and the others abandoned him in the fuselage and made their new pub in the Mechanic's loading bay. Martin goes to pay them a visit and rings Carolyn to inform her of the pub. Douglas orders the boys out the pub before Carolyn gets there. Douglas pretends to be her mystery mischief maker. She gets mad and throws Martin out of the bar, Douglas and Carolyn share and drink and Douglas tells her that the new pub will be in the Fireman's Lounge,