In Into the Woods, Giles talks about his “Ripper days”, seen first in season two’s The Dark Age.

In Into the Woods, Spike says “Ain’t love grand?” which he also says to Dawn in Seeing Red.

In Into the Woods, Giles hangs a sign in the Magic Box which says: “Don’t forget, Winter Solstice, Hanukkah, Christmas, Kwanzaa and Gurnechnar’s Ascendance are coming!”

Chicken feet are a staple ingredient in witchcraft. They’re mentioned a few times in Buffy. In Doppelgängland, Willow says angrily to Anya, “I believe these chicken feet are mine.” In Forever, Anya says to Dawn, “We have some very amusing chicken feet you can play with.” In Into the Woods …

In Real Me, Xander and Anya look after Dawn for Buffy. Anya brings a few board games with her including the Game of Life. Later, when they’re playing the game, they have the following conversation:
Anya: “Oh, crap. Look at this! Now I’m burdened with a husband and several tiny pink …

A continuing joke for Buffy throughout the show is her misunderstanding of common phrases or sayings. In Gingerbread, she and Angel have the following conversation:
Buffy: “Like that kid in the story, the boy that stuck his finger in the duck.”
Angel: “Dike… It’s another word for dam.”
Buffy: “Oh. Okay, that story …

In Into the Woods, Buffy, momentarily forgetting her slayer strength, hugs the Doctor who successfully performed Joyce’s surgery a little too hard. This also occurred in Flooded, when Buffy hugged Giles, nearly squeezing him to death.

The Initiative was closed down completely in Primeval, but in Into the Woods, we discover that there’s still a branch of the army that hunts and kills demons, but doesn’t study them. Surely this was the problem in the first place? The Initiative were upsetting the natural balance by killing …

The military guys show a real feat of stamina in Into the Woods. When Riley gets home, they’re waiting in his apartment - in the dark - just standing in a row. How long have they been there? How long would they have stayed, just standing there in the dark, …

Marc Blucas left Buffy the Vampire Slayer in the episode Into the Woods, but appeared again in season six’s As You Were for one episode. Since leaving the show, Marc has appeared in We Were Soldiers, A View from the Top, Sunshine State, I Capture the Castle, The Alamo, First …

Bailey Chase played military-man Graham Miller for the final time in the episode Into the Woods.

Riley lies to the Scoobies in Listening to Fear and calls the military for help with the Queller demon. He eventually decides to join the military in Into the Woods.

In Listening to Fear, Willow says, “I don’t want to be the one who finds the bodies anymore”, referring to the episodes Real Me (when she tripped over the body of Mr. Bogedy, the magic shop owner) and Doomed (when she found a dead student in a bed).

The Scoobies do research in the UC Sunnydale library in Listening to Fear, which we saw first in The Freshman.

Joyce reveals to Buffy in the episode Listening to Fear that she knows Dawn is not her daughter. She asks Buffy to take care of her, no matter what, which leads to Buffy’s determination at the end of season five that nothing should happen to her sister:
Joyce: “That Dawn… she’s …