Wikimedia Commons/The Boys Season 5 TV Supernatural reunion in The Boys Season 5! Jared Padalecki joins as Mister Marathon, teaming with Misha Collins and Jensen Ackles. April 14, 2026 AceShowbiz - The Boys fans have long anticipated the involvement of Jared Padalecki in the series' final season, and now his role has been officially confirmed. After Jensen Ackles was revealed as Soldier Boy, excitement grew among fans of the cult hit series Supernatural hoping for a reunion with their former co-star.