Embarking on a search to unravel Cassidy's secrets, Jesse locates a mysterious acquaintance from his old pal's past. Meanwhile, Starr's woes continue with a possible challenge to his authority arriving on the scene in the form of the Grail Allfather.

Jesse starts looking into Cassidy's history and finds a woman willing to tell; Starr meets Eisenstein, who is looking for answers; Hoover makes his goal