Synopsis by Brian J. Dillard
Evil goddess Glory (Clare Kramer) finally knows that The Key she needs to unleash hell on earth has been incarnated as the Slayer's very own sister. Thus, Buffy (Sarah Michelle Gellar) and her gang are forced to flee Sunnydale in a desperate attempt to save Dawn (Michelle Trachtenberg) -- and the world -- from the apocalypse. Unfortunately, their unlikely escape vehicle -- a Winnebago -- proves vulnerable to attack by the Knights of Byzantium, ancient warriors who have sworn to destroy The Key before Glory can use it. Giles (Anthony Stewart Head) suffers grievous wounds, forcing the gang to take refuge in an abandoned gas station. Resident Wiccan Willow (Alyson Hannigan) erects a mystical barrier, but, thanks to the relentless knights, a stalemate ensues. The misguided but honorable Byzantine leader allows Buffy to send for medical assistance. She calls Ben (Charlie Weber), the handsome young doctor she's been flirting with for several episodes. Unbeknownst to the Scoobies, Ben is the unwilling human host for Glory's earthly manifestation. Once inside the barrier, Ben patches Giles up but then loses his constant battle with Glory for control of their shared body. The triumphant hell-goddess makes off with Dawn and slaughters the Knights of Byzantium, leaving Buffy a catatonic shell of her normal self. Originally broadcast May 8, 2001, on the WB network, "Spiral" marked episode 98 of the cult-favorite series.