Innocence (Buffy episode)

Angel loses his soul after sleeping with Buffy the previous night. He leaves to go and join with Spike and Drusilla while the Scoobies struggle to find a way to defeat "The Judge". Using his memories of being a soldier from his costume from "Halloween," Xander gets a bazooka to blow up "The Judge". Buffy uses it and saves the day while the vampires escape to cause more havoc.