 The play was adapted for broadcasting by Marjorie Pratt and produced by Howard Rose.Not completely satisfied with the play itself, Christie decided to try her hand at playwrighting and wrote "Black Coffee" – a stage play not based on a previous work and again featuring Poirot.It was first presented in 1930 but after this Christie decided that Poirot was too strong a character to be portrayed on stage and removed him from all of her own subsequent adaptations of her books.