In Ireland long ago there was a powerful fighting force called the Fianna. The story begins with Fionn's father Cumhaill, leader of the Fianna, and the battle between his Clan Baíscne and clan Mac Morna.
| Actor | Role |
|---|---|
 Matty McCabeAedh (Goll) mac Morna | Aedh (Goll) mac Morna |
| AAlicia McMichaelAoife | Aoife |
 Lacy MooreThe Mórrígan | The Mórrígan |
 Hilary Bowen-WalshBodhmall ingen Trénmór | Bodhmall ingen Trénmór |