Night Shift; Darkness Diagnosed with twin sisters Laurie and Julie — psychiatric nurses who discuss and dissect the darkest minds — returns for episode two. This episode examines the 2014 Springville, Utah case in which Benjamin and Kristi Strack and their three children were found dead, exploring toxic drug mixtures, possible substance use and the influence of imprisoned convicted killer Dan Lafferty. Julie and Laurie analyze the psychology behind folie à deux (shared psychosis), personality disorders, isolation and system failures that can contribute to family tragedy, blending case details with clinical insight and personal commentary.