There's more new BBC drama this evening, and this time it's a Hitchcock remake. Socialite Iris Carr (Tuppence Middleton - no relation) is on her way back to England after a holiday in the Balkans, when she faints in a railway station in the heat. Fellow passenger Miss Froy takes helps her, but when Iris falls asleep, her new friend disappears. It doesn't exactly help that nobody on board remembers seeing her either. Tough, isn't it? When you only have a ridiculously handsome fellow passenger, by the name of Max Hare, to help you solve the mystery?