Cabin Pressure: Xinzhou (Episode 5, Series 4)

Stephanie Cole, Benedict Cumberbatch & Roger Allam star in the fourth series of the hit sitcom about the tiny charter airline for whom no job is too small, but many, many jobs are too difficult.

By John Finnemore (The News Quiz, Mitchell & Webb). Run by the forbidding divorc©e Carolyn Knapp-Shappey (an unfortunate marriage, namewise, but in Carolyn's opinion, marginally better than Carolyn Shappey-Knapp), her two pilots are the smooth, experienced and almost-certainly-fired-by-a-big-airline-for-all-round naughtiness Douglas, and struggling almost-competent pilot and sweaty man Martin. All-round help is provided by Carolyn's near-idiot son, Arthur...

For episode 5, we're arriving at Xinzhou where it's cold, it's dark and there's no food on board. What better time for Gertie to decide to fall to bits? And what worse time for Arthur to try out his maths skills?