This article offers a preliminary investigation of the delivery of an intensive version of manualised cognitive–behavioural therapy for adolescent obsessive–compulsive disorder (OCD). The aim was to address issues of treatment accessibility within the area, including a shortage of therapists who feel competent and possess the expertise to successfully deliver these protocols. Two male adolescents, with a principal diagnosis of OCD, participated in eight weekly 150-minute sessions. A series of diagnostic, symptom severity, global functioning, and self-report measures were completed at pretreatment, across treatment weeks, at posttreatment, and at 6-week follow-up. Further, monitoring of multiple baselines across behaviours for each adolescent across treatment weeks served to extend results beyond mere end points. Process issues specific to each adolescent, his family, and the therapeutic relationship were considered. Along with the overall outcome results, such information aimed to provide useful data for clinicians interested in implementing the program. Reductions in OCD symptomology and symptom severity for both participants at posttreatment and at 6-week follow-up suggest that an intensive format of treatment delivery might benefit some adolescents.