A full-cast BBC Radio 4 dramatisation of an Agatha Christie story. On a flight from Le Bourget to Croydon, on which Hercule Poirot is an apprehensive passenger, a woman is found dead. A doctor on board is inclined to put it down to a wasp-sting, but Poirot suspects that a poisoned dart is the real cause - and, perhaps rather too conveniently, a blow pipe is dicovered stuffed down the back of his seat ...