Agatha Christie: the case of theatre's criminal mastermind
The queen of the whodunnit has never gone away, but with John Malkovich playing Poirot and two radical stage adaptations, it's no mystery why a new generation is falling for herThe interior of St Martin's theatre in London is a luscious red, with ornate wood panelling picked out in coral and gold. Piano music floats gently across the auditorium. It feels slightly like a shrine, which in effect it is, since from 1974 …