Wikimedia Commons/The Boys Season 5 TV The Boys Season 5 finale nears as Jared Padalecki's Mister Marathon arrives, reuniting Supernatural stars in dark new roles. April 28, 2026 AceShowbiz - The Boys Season 5 is progressing through its final episodes, and fans eagerly anticipate the arrival of Jared Padalecki as Mister Marathon. Alongside Misha Collins and Jensen Ackles, both joining the superhero series for its concluding season, this reunion of former Supernatural stars promises to be a major highlight.