Dr. Lital Meldnik, psychiatrist in adolescent care who illustrated sublimation with a Batman example. Dr. Amanda Sekijima, child psychiatry fellow with cross-cultural movement experience, on identification and reversal. Chris D'Adana, counselor focused on transformational change, on reaction formation. Dr. Natalie Dreyfus, psychodynamic NP and clinic founder, on undoing. Dr. Katya Rene, psychiatrist working cross-culturally, on moralization. Dina Golden, PMHNP and professor, on rationalization. Dr. Jeanette Hotelling, psychodynamic PMHNP, on isolation of affect. Dr. Olga Kuznetsova, hospital psychiatrist, on compartmentalization and repression. Dr. Jason Mallow, outpatient psychiatrist, on regression and clinical formulation. They discuss mature defenses like sublimation, humor, repression, compartmentalization, isolation of affect, intellectualization, rationalization, moralization, undoing, displacement, reaction formation, identification, and reversal in vivid clinical contexts.