Upcoming episodes, programme details and where to watch over the next seven days. All times are UK time.
Mae dwr yr harbwr wedi troi'n wyrdd dros nos. Tybed beth yw e a sut y gwnaiff yr Harbwr Feistr cael gwared ohono? The harbour water has turned green overnight. What is causing this?
Mae Cen Twyn wedi bod yn gweithio ar brosiect newydd ers tro ac mae Twt ar dan eisiau gweld beth yw'r peiriant newydd. Twt can't wait to see what Cen's new machine is and what it does.
Mae Cen Twyn wedi creu cerbyd newydd sbon ar olwynion. Cen Twyn has created a brand new vehicle with wheels. Twt achieves one of his dreams and is able to come out of the water.
Mae 'na swn rhyfedd iawn yn yr harbwr heddiw - swn rhywun yn canu - neu'n ceisio canu, o leia'! There are some funny sounds at the harbour today. Someone's trying to sing!
Mae Bethan yn penderfynu creu casgliad o rywbeth ond mae methu'n lân â phenderfynu beth i'w gasglu. Bethan decides to start up her own collection, but can't decide what to collect.