The aim of this study is to test the effectiveness of a one-week BITT in adolescents with PTSD and comorbid symptoms and their caregiver(s). In this multicenter, single-blinded RCT, we will recruit participants from for youth care centers in the European and Caribbean Netherlands: Levvel, Karakter, Fornhese-GGz Centraal, and Mental Health Caribbean (Bonaire). We will randomly allocate adolescents (12-18 years old) with PTSD to a BITT (n=50) or waitlist control group (WLCG; n=50). BITT consists of a one-week (i.e., five consecutive workdays) intensive trauma treatment, encompassing daily 90-minute manualized sessions of TF-CBT and EMDR. The day begins and ends with psychomotor therapy. The caregiver(s) receive daily parental counseling sessions consisting of psycho-education and social support skill training. We will conduct measurements at similar time intervals for both groups: at pre-treatment, directly after BITT or WLCG, and at 3, 6, and 9 months follow-up. The WLCG will receive BITT after the 3-months follow-up assessment. We will assess all study parameters using digital/face-to-face questionnaires and (semi) structured interviews conducted by a research psychologist blinded to randomization. We will assess the primary outcome PTSD symptoms using the Child and Adolescent Trauma Screen (CATS-2) and the Clinician-Administered PTSD Scale for Children and Adolescents DSM-5 (CAPS-CA-5).