In the season retrospective, Joss Whedon says the battle between Angel and Spike in this episode is the highlight of the final season. That battle, Scott McLaren argues, "succeeds in portraying an almost perfect balance between the concepts of the soul as existential metaphor and ontological reality." Since the Shanshu prophesy destines the ensouled vampire to a pivotal and dangerous role in the ultimate battle between good and evil, Spike and Angel's souls function both as "heavy burdens and precious baubles."