Ireland 1587. Hugh O'Donnell inherits the title of The O'Donnell, the prince of Donegal, and tries to unite Ireland to make war on England. But then Hugh is kidnapped and imprisoned by the Viceroy of Ireland and held ransom for the Clans' good behavior. Hugh must escape prison and the Viceroy's villainous henchman, Captain Leeds, before he can fight.
| Actor | Role |
|---|---|
 Peter McEneryHugh O'Donnell | Hugh O'Donnell |
 Susan HampshireKathleen McSweeney | Kathleen McSweeney |
 Gordon JacksonCaptain Leeds | Captain Leeds |
 Norman WoolandSir John Perrott | Sir John Perrott |
 Richard LeechPhelim O'Toole | Phelim O'Toole |
 Tom AdamsHenry O'Neill | Henry O'Neill |
 Peter JeffreySergeant | Sergeant |
 Marie KeanThe Mother | The Mother |
 Bill OwenOfficer Powell | Officer Powell |
| PPeggy MarshallPrincess Ineen | Princess Ineen |
 Maurice RoëvesMartin | Martin |
 Donal McCannSean O'Toole | Sean O'Toole |
 Fidelma MurphyMoire | Moire |
| JJohn Forbes-RobertsonNot listed | Not listed |
 Patrick HoltNot listed | Not listed |
| RRobert CawdronNot listed | Not listed |
| MMaire O'NeillMoire's Sister | Moire's Sister |
 Máire Ní GhráinneMoire's Sister | Moire's Sister |
| RRoger CroucherNot listed | Not listed |
| KKeith McConnellNot listed | Not listed |
| IInigo JacksonNot listed | Not listed |
 Peter CranwellNot listed | Not listed |
 Andrew KeirLord McSweeney | Lord McSweeney |
| PPeter BrooksSergeant at Arms | Sergeant at Arms |