: We learn that Dex suffers from multiple conditions, including borderline personality disorder and psychopathic tendencies. His therapist, Dr. Mercer , served as his "morality chain," teaching him empathy through scripts (such as "I'm sorry, that sounds hard"). Without her guidance, or his current obsession, Julie, Dex begins to spiral into violence. Fisk’s Master Plan: The Architect of Misery
: Fisk identifies Dex as the city's "new villain," realizing that by removing Dex's anchors (like Julie), he can slide into the role of Dex's new "rock-solid mentor". Interpersonal Collapse [S3E5] The Perfect Game
: The episode title refers to a childhood baseball game where young Dex, an orphan with unerring aim, was pulled from the mound by his coach to give another child a turn. In a cold display of calculation, Dex killed the coach with a ricocheted baseball, later admitting to his therapist that it was intentional. : We learn that Dex suffers from multiple