In Enemies, Cordelia asks Wesley if he ever thought of doing “books on tape”. In real life, Charisma Carpenter did the voices for the Buffy audio book Immortal.

Gary Bullock, who played the shrouded demon who pretended to remove Angel’s soul in Enemies, has been in Holes, The Kiss, Twin Peaks: Fire Walk with Me, Robocop 2, Robocop 3, The Handmaid’s Tale, Enterprise, The X Files and Species.

In Enemies we see that Oz has dyed his hair blonde since the previous episode (Doppelgängland). This is possibly something to do with the fact that Seth Green had just finished filming Austin Powers - The Spy Who Shagged Me, in which he played a blonde Scott Evil.

When Vampire Willow was at the Bronze in Doppelgängland, she bit a girl named Sandy. Riley later met the girl in Willy’s Bar in the season five episode Family. He realised she was a vampire, so Vampire Willow or another vampire must have followed through and sired Sandy. Riley staked …

In Doppelgängland, Principal Snyder makes Willow teach Percy in order to keep his grades up so he can play basketball. He made Willow coach students previously in the episode Go Fish. Snyder refers to the events of that episode as “the swim team debacle of last year”. Willow continues to …

In Doppelgängland, Willow says she never wants to end up evil, because the vampire Willow “messed up everything she touched”. Willow became evil at the end of season six, after her girlfriend Tara was murdered.

Vampire Willow’s attraction to women in Doppelgängland is a foreshadowing of Willow’s future as she has a relationship with Tara from season four, and with Kennedy in season seven. Buffy says in this episode “vampires are nothing like the people they were, right?” to which Angel replies, “well, actually…” Willow …

In Doppelgängland, Xander says, “So we charge in, much in the style of John Wayne?” referencing the actor John Wayne (1907-1979) who was most famous for his roles in western and war movies. Wayne was also referenced in the episode The Initiative, when Buffy called Riley “John Wayne”.

Doppelgangers are the ghosts of living people. They are identical in every way. Mythology has it that if you meet your doppelganger you will die, though this isn’t the case in the Buffyverse.

The band playing on stage in the Bronze in Doppelgängland when Vamp Willow enters is K’s Choice, playing their song ‘Virgin State of Mind’.
In Hush, as Tara runs up the stairs to escape the Gentlemen, she passes a board. If you look closely or pause the picture, you will see …

In Doppelgängland, Buffy says, “I know Faith’s not gonna be on the cover of Sanity Fair, but she had it rough.” This is a pun on the fashion magazine Vanity Fair, and Faith’s fluctuating mental state.

In Doppelgängland, Xander asks Willow, “did you remember to tape Biography last Friday?” This is a reference to the TV show Biography, which is shown on the A&E network in America. Each episode is a biography of a famous person.

Early on in the episode Doppelgängland, when the Mayor is introducing Faith to her new digs, there is a red-wrapped fruit basket on one of the tables. There are two daggers in the basket, obviously in a nod as to what kind of “father figure” the Mayor is and what …

In Doppelgängland, Anya reveals that she is 1120 years old to the bartender at the Bronze.

Norma Michaels, who played the ‘Older Woman’ in Doppelgängland, appeared in the Angel episode ‘Happy Anniversary‘ as Aunt Helen.