Drama newydd. Mae newid ar y gorwel ym Mhenwyllt a'r werin yn poeni bod eu tref ar fin diflannu. Margaret and Clive's normal lives are catapulted into the middle of a big mystery.
How to watch Pren ar y Bryn
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Drama newydd. Mae newid ar y gorwel ym Mhenwyllt a'r werin yn poeni bod eu tref ar fin diflannu. Margaret and Clive's normal lives are catapulted into the middle of a big mystery.
Content no longer available