Rings of Power's Istar, Sauron sets up a bigger season 2 - Polygon

The Rings of Power’s episode 8 finale names Halbrand as Sauron, The Stranger as an Istar that’s likely Gandalf, and prepares Middle-earth for a different battle than Tolkien imagined in Lord of the Rings.

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Lord of the Rings: The Rings of Power — Every Major Character Introduced in the Premiere - IGN

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Rings of Power's biggest ending and season 2 questions, answered - Polygon

Lord of the Rings: The Rings Of Power' Season 1 Finale Spoilers: Sauron Twist Revealed, Season 2 Teased & New Characters From Tolkien Canon Promised – Deadline