Richard Burton
— King Mark of Cornwall
Kate Mulgrew
— Isolt
Nicholas Clay
— Tristan
Cyril Cusack
— Gormond of Ireland
Geraldine Fitzgerald
— Bronwyn
Niall Tóibín
— Andred
Diana Van der Vlis
— Alix
Niall O'Brien
— Corvenal
Kathryn Dowling
— Yseult of the White Hand
John Jo Brooks
— Father Colm
Trudy Hayes
— Anne
John Scanlon
— Bishop
Bobby Johnson
— William the Guard
John Labine
— Eoghanin