The scenes that are marked as taking place in Westbury were actually shot at Anthony Head's house in Somerset, England. Filming was done on his private property to avoid complications associated with doing business in Britain. He owns the horse seen in the episode, and it is named Otto.
When the writers first came up with the character of Robin Wood, they weren't definite on whether it would be a man or a woman, so they picked a name that could apply to either gender.
In season 6's DVD extras, the cast appeared on Academy of TV Arts and Sciences Panel Discussion. Here Michelle Trachtenberg said that she'd been begging Joss Whedon to let her character wear black, seeing as she'd never been allowed to in order to keep her looking youthful and innocent. Dawn is seen wearing almost all black here on her first day of school.
Willow's mentor in England, Ms. Harkness, is named after the Marvel Comics character, Agatha Harkness, who is also a witch.
At this point, the Scooby Gang has the fewest active members at any time in the series: Buffy, Xander, and Dawn. From the previous season: Willow turned evil and is now being rehabilitated in England, Giles moved back to England, Anya became a vengeance demon after her failed wedding, Tara was killed, and Spike left Sunnydale to regain his soul. All will return to the Scooby Gang throughout the season, with the exception of Tara.