This thesis examines the adaptation of stage plays to cinema, and of films to theatre. The creative component of the thesis consists of my full-length play script Hamlet Dies At The End, and the script of its feature film adaptation (Song’s End), plus material from my film script Roy Jiminton and the script of its adaptation to theatre. The critical component of this thesis examines seven stage-to-film adaptations and four film-to-stage adaptations, in order to illustrate the distinctions between writing for the two different mediums and to suggest principles to aid scriptwriters in adapting material between theatre and film. The thesis concludes with discussion of the decisions I made when adapting my own scripts. This thesis argues tha...