Silas' first appearance, in a flashback.
A member of Wisteria, Grissom is currently working with Prince Edric. It's implied that he's been murdering Princes by earning their trust, then laying the blame of their disappearance on the Gard.
Silas threatens Ashton.
He seems to dislike or even hate Ashton, and is seen holding a sword across Ashton's throat in a flashback. When he sees him again in Alderton, he gives chase.