Kate's father, Trevor Lockley, gets involved in a demon drug smuggling operation and he's soon in over his head. When a demon high on drugs attacks the subway, Angel begins investigating and quickly discovers Trevor's shady dealings. He tries to warn Trevor, but it's too late. When Trevor is attacked, Kate blames Angel for not doing more. Meanwhile, through flash backs, Angel's own father is introduced, Angel's past as a human is shown and Angelus is born. Written by
Did You Know?
Since Angel's real name is Liam, which is a nickname for William, and Spike was known as William the Bloody, they essentially have the same name. This was intended by Joss Whedon and the other writers. James Marsters, who played Spike, can be found in many YouTube interviews and conversations with fans at conventions saying that Angel was the right boyfriend for Buffy, and that Spike was the bad boy, and therefore the bad boyfriend for Buffy. See more
When Angelus has just emerged from his grave, Darla encourages him to feed from the Grounds Keeper. Angelus goes into game-face with fangs and attacks the Grounds Keeper's neck. We can hear him drinking, actually slurping; but immediately afterward, there is no blood on his mouth or teeth. See more
I think you'll find most people require some period of adjustment after being confronted with the dark forces which surround us. Women in particular...
[Cordelia is kneeling over a demon with a hacksaw in hand
[starts to saw into the demon
...struggle with it.