| Series cast summary: |
 | John Ogwen | - | Thomas Jones (Twm Sion Cati) 5 episodes, 1978 |
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 | Jane Asher | - | Lady Johane Williams 5 episodes, 1978 |
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 | Meredith Edwards | - | Sir Tom 5 episodes, 1978 |
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 | Philip Madoc | - | Victor Davyd / - 5 episodes, 1978 |
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| Jack May | - | John Stedman 5 episodes, 1978 |
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 | Tom Owen | - | Young Stedman 5 episodes, 1978 |
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 | Gareth Armstrong | - | Robin 4 episodes, 1978 |
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| Huw Ceredig | - | Rhys 4 episodes, 1978 |
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| Terence Davies | - | Red Owain 4 episodes, 1978 |
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| Godfrey James | - | Shanco 4 episodes, 1978 |
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| Stewart Jones | - | Steward 4 episodes, 1978 |
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| Gareth Lewis | - | Wil Ap Cradic 3 episodes, 1978 |
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| Dewi Morris | - | Ieuan Rogers 3 episodes, 1978 |
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| John Prior | - | Recruiting officer 3 episodes, 1978 |
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| Dyfed Thomas | - | Dewi 3 episodes, 1978 |
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| Rachel Thomas | - | Agnes 3 episodes, 1978 |
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| Charles Williams | - | Meredgand 3 episodes, 1978 |
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| Ronnie Williams | - | Lewys Ddu 3 episodes, 1978 |
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