- Barn 81 (Chwefror 2015): ABC Conjecture, Cragen Trinil, El niño 1997
- Barn 82 (Mawrth 2015): Bys a bawd, Poen, Cronoteip
- Barn 83 (Ebrill 2015 estynedig)
- Barn 84 (Mai 2015): Pengwiniaid, Nerfau, Temlau, Sêr
- Barn 85 (Mehefin 2015)
- Barn 86 (Hâf 2015): Machiavelli, Te, Parkinson, Ossinodus
- Barn 87 (Medi 2015): Cysylltu ymennydd, Arth wen a mursennod mor, Penfras
- Barn 88 (Hydref 2015): Ail Adrodd Arbrofion biofeddygol, CRISPR, Turing
- Barn 89 (Tachwedd 2015): Dyn Kennewick, Dyn Mota, Ffoaduriaid
- Barn 90 (Nadolig 2015): Plwto, Gordewdra
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