Willow’s views on Thanksgiving (seen in 4.08 Pangs) seem to come directly from her mother, Sheila, who we met in 3.11 Gingerbread:

Willow: “Yeah. Thanksgiving isn’t about blending of two cultures. It’s about …

The first and only time we see Cordelia’s parents is in 4.05 Supersymmetry. They can be seen in one of the pictures that Cordelia hangs up to help her remember who …

We discover in 3.17 Enemies that Faith’s mother was a drunk who wouldn’t let her daughter have a puppy:

Faith: “Maybe it’s one of those unhappy childhood things. See, when I was …

Hank was Buffy and Dawn’s elusive father. Divorced from Joyce Summers, he became increasingly distant towards Buffy (for example, standing her up on her birthday in 3.12 Helpless). Hank failed to …

Willow’s neglectful father was called Ira Rosenberg, mentioned only in the episode 2.17 Passion and never seen on screen.

Tara’s father, Mr. Maclay, appeared in the episode 5.06 Family. He was a domineering man who led all women in his family to believe they were half demon. Buffy and the …

In 3.19 The Price, Groosalugg mentions that his mother’s name is “Pomegranate”.

This line of Riley’s was deleted from the episode 4.12 A New Man:

“My dad was out of work for a while back. He sells farm equipment. It was rough.”

Sheila Rosenberg, Willow’s mother, is mentioned by Willow in 7.13 The Killer In Me:

“My mom was all proud like I was making some political statement. Then the statement mojo wore …

Giles revealed in 1.05 Never Kill A Boy On The First Date that he was ten when his father told him that he was destined to be a Watcher. Giles wanted …

We get the first impression that something is wrong in Wesley’s relationship with his father in 1.14 I’ve Got You Under My Skin, when he says, “A father doesn’t have to …