Angel asks Cordelia if she knew what it was like to be run through with a rebar and she says she does. In Lovers Walk (1998) she fell through a set of stairs and was run through by a piece of rebar. Also, Charisma Carpenter actually was run through by a piece of rebar when she was a child. The scar is visible on her stomach.
This is the first appearance of Gunn's hubcap axe.
This is the first episode to be written by Mere Smith, who would remain as one of the show's main writers until the end of the fourth season.
The dream Darla is giving Angel is of his murder of a gypsy girl. Though not explicitly stated, this is likely supposed to be the same event shown in flashback in Five by Five (2000), the turning point in Angel's life, although the dream sequence does not match exactly with the flashback. The aftermath of this event is shown in Becoming: Part 1 (1998) - the gypsy girl's family curses Angel by restoring his soul.