Merlin: When she spoke, her voice, it was as though it came from the depths of the Earth. And her eyes... they were so sad. So much pain in them. Who is she?
Gaius: The Cailleach... the Gatekeeper to the Spirit World.
Merlin: Why was she there?
Gaius: It was on the stroke of midnight of Samhain's eve. The moment when the veil between the worlds is at its thinnest. It cannot be a coincidence.
Merlin: Why was I the only one to see her?
Gaius: You have great power, Merlin. For someone so gifted, such visions are not uncommon.
Merlin: You don't understand. It wasn't a vision. She knew who I was. She called me Emrys... what is it? What does it mean?
Gaius: I'm not sure. But if someone has torn the veil between the worlds, then God help us all.