RecruitingBehavioural interventionBrief Treatment for Trauma Nightmares in Trauma-exposed Adults With Bipolar DisorderExposure, relaxation, and rescripting therapy (ERRT) is a promising psychological intervention developed to target trauma-related nightmares and sleep disturbances. Though further evidence is needed, ERRT has shown strong support in reducing the number and intensity of nightmares, as well as improving overall sleep quality in both civilian and veteran samples. This study will assess the efficacy in individuals diagnosed with bipolar disorder.