"Series Regular" host Josh Wigler dives deep into season three episode four of HBO's "Westworld," the genre-bending drama about killer robots in a killer world. Directed by Paul Cameron and written by Jordan Goldberg and Lisa Joy, "The Mother of Exiles" answers one of the biggest questions currently on the "Westworld" board: who is Charlotte Hale? Wonder no more — but along with the answer about who Tessa Thompson is playing this season, come so many more questions about Dolores (Evan Rachel Wood) and her dark intentions. Beyond the big reveal, season three's fourth outing also includes the first appearance of Ed Harris as the Man in Black since season two, plus a showcase for Maeve (Thandie Newton) and some of the skills she learned once upon a time in Shogun World. Wigler recaps all these events and more, with the help of this season's Series Regular co-host, The Hollywood Reporter senior producer Marya Gullo.