The 39 Steps (1935) - publicity still - Publicity still for ''The 39 Steps'' (1935).The 39 Steps (1935) - photograph - Photograph from ''The 39 Steps''.The 39 Steps (1935) - on set - On set photograph from ''The 39 Steps'' (1935).The 39 Steps (1935) - on set - On set photograph from ''The 39 Steps'' (1935).The 39 Steps (1935) - photograph - Photograph from ''The 39 Steps''.The 39 Steps (1935) - photograph - Publicity still from ''The 39 Steps''.Sabotage (1936) - advert - Early publicity for ''The Hidden Power'' (later retitled ''Sabotage'') from ''Motion Picture Daily'' (03/Jun/1936). Robert Donat was forced to drop out after suffering a bout of acute bronchitis and was replaced by John Loder.The 39 Steps (1935) - on set - On set photograph from ''The 39 Steps''.The 39 Steps (1935) - on set - On set photograph from ''The 39 Steps''.The 39 Steps (1935) - photograph - Photograph from ''The 39 Steps''.The 39 Steps (1935) - photograph - Photograph of actor Robert Donat in ''The 39 Steps''.The 39 Steps (1935) - on set - On set photograph from ''The 39 Steps'' (1935).Sabotage (1936) - advert - Early publicity for ''The Hidden Power'' (later retitled ''Sabotage'') from ''Variety'' (10/Jun/1936). Robert Donat was forced to drop out after suffering a bout of acute bronchitis and was replaced by John Loder.The 39 Steps (1935) - photograph - Photograph from ''The 39 Steps''.The 39 Steps (1935) - photograph - Publicity photograph from ''The 39 Steps''.