Season 3 Episode 17
Episode aired march 16, 1999
as faith attempts to seduce angel and steal his soul, the mayor summons a dark-magic demon to finish the job.
after meeting skyler, buffy allows him to depart unharmed rather than slaying him, noting that he seems harmless. this marks the widening of one of the buffyverse's overall themes, that demons are capable of being benign whereas soulless vampires are not, a concept introduced in becoming: part 1 (1998) and explored more fully in angel (1999).