Peacock Announces Season 3 of Steven King’s MR. MERCEDES Gallery Peacock Announces Season 3 of Steven King’s MR. MERCEDES Episodes, Television Peacock Announces Season 3 of Steven King’s MR. MERCEDES Peacock Announces Season 3 of Steven King’s MR. MERCEDESRemy Cashman2021-02-09T23:52:32-08:00