- Unknown:
- Hugh David
- Production By:
- Emyr Humphreys
- Dai Williams:
- Hugh David
- Seth Pritchard:
- Michael Aspel
- Dicky Bach Dwl:
- Moses Jones
- John Pritchard:
- Ieuan Rhys Williams
- Shenkin Morris:
- Prysor Williams
- Professor Hughes-Lewis:
- John Hugh Jones
- Powell, the policeman:
- Brinley Jenkins
- Teleri Thomas:
- Gillian Sterrett
- Mary Ellen:
- Beti Jones
- Rachel Parry:
- Ennis Tinnusche