Another BBC adaptation of an Agatha Christie novel, this time Murder on the Orient Express (via my local library, which had it on CD). You can call this contrived all you like (as I recall, Randall Garrett does, through one of his Lord Darcy mysteries), but its core concept does have an emotional punch, perhaps all the more so for listening to it. If nothing else, hearing the various accents made it easier to keep the many characters straight. (For a change, the American accents were good enough to not be overly distracting, though at least the principal American character (Mrs. Hubbard) was played by a British actress (Sylvia Syms).) This is well-suited to audio drama.