1 Tymor
8 Pennod
It's Only a Theory - Season 1 Episode 1
The guest celebrity is sports presenter Clare Balding and the experts are Dr Aubrey de Grey and Lucy Beresford.
- Blwyddyn: 2009
- Gwlad:
- Genre: Comedy
- Stiwdio: BBC Four
- Allweddair:
- Cyfarwyddwr: Andy Hamilton
- Cast: Andy Hamilton, Reginald D. Hunter