In Bring on the Night, the Scoobies research the First Evil in The Watcher’s Codex.

Buffy name checks the scary movie The Blair Witch Project when she’s talking to Principal Wood in Bring on the Night.

In Bring on the Night, Xander suggests they lock the Turok-Han in the pantry, and later says, “Are you saying M. Night Shamalayan lied to us?” He’s referring to the 2002 movie Signs, directed by M. Night Shamalayan. In that movie, an alien is locked in a pantry.

In Bring on the Night, Xander and Andrew compare the school basement to issues 297-299 of the Wonder Woman comic ‘Catacombs’. Joss Whedon has been chosen to direct the 2006 movie version of Wonder Woman.
Cordelia’s birthday cake in the episode Birthday is decorated with an image of Wonder Woman. Charisma …

The episode Bring on the Night gets it’s title from a 1985 documentary (a ‘rockumentary’, if you will) starring Sting.

Anya wears reading glasses for the first time in the episode Bring on the Night.

Kristine Sutherland is credited as a special guest star in the episode Bring on the Night, in which Buffy dreams that she sees her mother. This is her final appearance in the series.

Giles arrives back in Sunnydale with three potential Slayers in Bring on the Night. He explains the current situation to the Scoobies: the Watcher’s Council has been destroyed, and most of the potential Slayers have been killed over the past few months (we’ve seen these in various episodes during season …

In Bring on the Night, Giles and Buffy visit the Christmas tree lot where Buffy first encountered the Bringers and the First Evil in Amends.

In Bring on the Night, Willow tries to find the First with a locator spell. It backfires and the evil possesses her briefly, exploding out of her and terrifying everyone in the process. When it’s gone, Willow is devastated, realising that any time she uses her power; she is liable …

In All the Way, Buffy says, “Don’t blame me if we keep having this conversation over and over…” she’s referring to Life Serial in which she was placed in a time flux by the nerds. In Bring on the Night, Xander says, “It’s a loop… like the Mummy hand.”

In Never Leave Me, Andrew says of Anya, “This one time I saw her having sex with Spike.” He’s referring to the events of Entropy, when he saw the two making love via camera.

Xander realises Spike has a trigger in Never Leave Me, which Anya thinks is “the horse”. She’s referring to cowboy Roy Rogers’s horse Trigger, who was considered to be “the smartest horse in the movies”. After his death in 1965, Trigger was mounted and placed in the Roy Rogers-Dale Evans …

In Never Leave Me, Warren says to Andrew, “You can do this. You’re my Iron Fist.” Iron Fist is a Marvel Comics character.

When he’s trying to get Andrew to kill the pig in Never Leave Me, Warren/The First says, “You’re Conan. You’re the destroyer. It’s you against nature.” This is a reference to the 1984 movie Conan the Destroyer, which starred Arnold Schwarzenegger. The movie was the sequel to Conan the Barbarian …