An apparatus for use in the conduct of cognitive behaviour therapy, the apparatus comprising: a surround vision system comprising: an enclosure including a plurality of walls, a ceiling and a floor, the enclosure providing a completely enclosed space, and within the enclosure a position for both an individual receiving therapy and a therapist to be situated during provision of therapy and a camera, wherein each of the plurality of walls and the ceiling are formed by a respective screen (2, 3), wherein one of the respective screens provides a closable access to and from the enclosure; and at least one processor and either a plurality of projectors (7, 8) configured to project images onto the respective screens (2, 3) or the respective screens are display screens configured to display images thereon such that the said images may be viewed from within the completely enclosed space, wherein the at least one processor synchronises the projection of images onto each screen (2, 3) or the display of images on each display screens such that the images are perceived by the viewer as being uninterrupted; sets of recorded scenes each set relating to the same theme, each set configured to represent a different level of challenge for the same theme; a controller for controlling the displaying images of a set on the screens of the surround vision system; and a command device adapted to communicate with, and send control signals to the controller, the command device for use by a person overseeing the delivery of therapy to the individual or by the individual receiving therapy for controlling the display of scenes on the screens of the surround vision system wherein the camera located within the enclosure is configured to capture the behaviour of the patient and therapist during use of the apparatus. an enclosure including a plurality of walls, a ceiling and a floor, the enclosure providing a completely enclosed space, and within the enclosure a position for both an individual receiving therapy and a therapist to be situated during provision of therapy and a camera, wherein each of the plurality of walls and the ceiling are formed by a respective screen (2, 3), wherein one of the respective screens provides a closable access to and from the enclosure; and at least one processor and either a plurality of projectors (7, 8) configured to project images onto the respective screens (2, 3) or the respective screens are display screens configured to display images thereon such that the said images may be viewed from within the completely enclosed space, wherein the at least one processor synchronises the projection of images onto each screen (2, 3) or the display of images on each display screens such that the images are perceived by the viewer as being uninterrupted; sets of recorded scenes each set relating to the same theme, each set configured to represent a different level of challenge for the same theme; a controller for controlling the displaying images of a set on the screens of the surround vision system; and a command device adapted to communicate with, and send control signals to the controller, the command device for use by a person overseeing the delivery of therapy to the individual or by the individual receiving therapy for controlling the display of scenes on the screens of the surround vision system wherein the camera located within the enclosure is configured to capture the behaviour of the patient and therapist during use of the apparatus.