You can watch Episode 3 for free by utilizing the 7-day free trial offered by Crunchyroll . This episode, titled "The Moriarty Household," is a pivotal chapter that completes the origin story of the Moriarty brothers. Where to Watch Online

While there are currently no permanent "free-to-stream" options without a subscription, several platforms host the series: Episode 3 | Moriarty the Patriot Wiki | Fandom