The Sign of FourWhere to watch The Sign of Four in Canada 🇨🇦The Sign of Four is streaming in Canada on Prime Video, Plex, Tubi.Stream in CanadaPrime VideoPlexTubiWhere to watch The Sign of Four in other countries🇺🇸 United States🇬🇧 United Kingdom🇦🇺 Australia🇫🇷 France🇧🇪 Belgium🇳🇿 New Zealand