Fred's parents come to take their daughter home - and at first there's suspicion between them and the staff of Angel Investigations.
An attack by an insectiod monster pulls everyone together though, and they become friends. Fred leaves with her parents, but on her way realises that the team are in terrible danger. She returns and saves the day, thus earning a place amongst them.
Trivia: Angel has just come back from visiting Buffy at the start of this episode. We never see the two together this time, but the story of their meeting was told by Buffy scriptwriter Jane Espenson in a comic, called Reunion.
There's a sly reference to an earlier work of Buffy and Angel creator Joss Whedon when Fred's mum mentions that her husband fell asleep during the last Alien film, Alien Resurrection. It was written by none other than Joss himself.