Instagram/Titus Welliver Celebrity Titus Welliver confirms talks for Bosch: Legacy Season 4. Get the latest update on the potential return of Harry Bosch and the expanding franchise. April 20, 2026 AceShowbiz - Titus Welliver, the lead actor of the acclaimed series Bosch: Legacy, has officially acknowledged that discussions are underway regarding a potential fourth season of the show. While no definitive decisions have been made, the actor provided an update that has sparked hope among fans eager for more installments.