- Writer/television script:
- Cliff Gordon
- Television script/producer:
- Michael Mills
- Singers:
- The Penydre Ladies
- Singers:
- The St. David's Singers
- Singers:
- The Morriston Male Choir
- Choirmaster:
- Meirion Williams
- Orchestra leader:
- Raymond Cohen
- Orchestra conducted by:
- Eric Robinson
- Designed by:
- Stephen Bundy
- Fight arranged by:
- Dave Crowley
- Producer assisted by:
- Roland Price
- Gwen:
- Curigwen Lewis
- Auntie Gwynneth:
- Diana Morgan
- Auntie Mary:
- Madoline Thomas
- Geraint Llewellyn:
- Stanley Baker
- Mrs. Lloyd:
- Rachel Thomas
- Cliff Lloyd:
- Donald Houston
- Mrs. Davies:
- Owen Brookes
- Mr. Davies:
- Fredric Steger
- Mr. Griffith:
- Roddy Hughes
- Bessie Lewis:
- Paddy O'Neill
- Olwen Davies:
- Gwyneth Vaughan
- Mr. Lloyd:
- Lyn Evans
- Morgan, a porter:
- Anthony James
- Rees, a booking-clerk:
- Dafydd Havard
- Seth Lloyd:
- Tom Raymond
- First miner:
- Tom Jones
- Ianto Davies:
- Glyn Houston
- Tom Rhys-Davies, tenor:
- Trefor Jones
- Twm Evans, baritone:
- Tom Williams
- Dr. Ogwen Owain-Mercer, organist:
- Dr. Paul Steinitz
- Nathias Moses, pianist:
- Tom McCall
- Billy Salvation Jones, solo trumpet:
- George Swift
- Other parts played by:
- Harry Parry
- Other parts played by:
- Richard Davies
- Other parts played by:
- Tonie MacMillan
