Last episode, appropriately enough, the ninth.
“No closer, Fionn,” the druid called from the boat where the Fianna were crowded with sullen faces. “I have brought you back to your time, but I cannot bring you back to your place. The Isles of Bliss must be your home forever.”
Fionn watched as the currach disappeared through a wall of mist. The chief of the Fianna would no more lead his men into battle or hunt the white stag. As he turned from the strand the druid’s voice floated to him across the waves.
“When we have need of you, Fionn, we will call, and you will answer.” He knew the meaning of the words. When the world of the otherworld woman met his, the final battle would begin. Fionn would be ready, and he was satisfied.