The cage constructed in this episode continues to be used throughout the rest of the season on various occasions.
Angel tells Connor to "get over it" - the same thing Cordelia told himself in the previous episode.
Angel's speech before he leaves to kill the Beast mirrors Buffy's rousing speech in Bring on the Night (2002).
This episode marks the second time a mystic is called upon to remove Angel's restored soul, the first (unsuccessful) attempt being Enemies (1999). In both episodes the two mystics are dressed in similar robes.
This is the episode that marks the memory of Glenn Quinn.