A number of writers from the cognitivist movement have developed tools to tackle the dreams of their clients. As reflections of automatic thoughts or thought patterns, dreams could become tools for change in everyday life. This has yet to be scientifically demonstrated. The therapeutic approach to recurring nightmares, particularly in Post Traumatic Stress Disorders, has led to the development of several care protocols. Among them, Examining Exposure, Relaxation, and Rescription Therapy (ERRT) and Imagery Rehearsal Treatment (IRT) have demonstrated their effectiveness through numerous studies. These treatments are based on the clients’ increased sense and feeling of control. Let us hope that cognitive and behavioral therapies will be able to understand and develop scientifically the utility of dreams on the one hand, and the treatment of nightmares on the other!