One of the strengths of La Brea is its well-developed and complex characters. Season 3 continues to explore the character arcs of familiar faces, including Dr. Sam Griffith (Aisha Tyler), Jack Vance (Christopher Noth), and Riley (Tori Hinson). The show also introduces new characters, such as Dr. Amanda (Annie Gonzalez), a scientist who becomes embroiled in the mystery of The Institution.