Tom Glynn-Carney stars in the hit “Game of Thrones” prequel “House of the Dragon” as King Aegon, a young monarch who is almost comically unsuited for the role.

There’s been nothing in the behaviour of Aegon Targaryen (Tom Glynn-Carney) to date that suggests ... to lead to a measured response. For his right-hand man Otto Hightower (Rhys Ifans), however ...