Buffy and Riley have to work out their relationship given their new understanding of what they do. An earthquake rocks Sunnydale and Buffy worries that it could signify the end of the world. They find out about a group of demons who are in town collecting sacred items which together have the power to end the world. When the plans of the demons are uncovered, the gang must return to their former sanctum inside the dilapidated Sunnydale High School (the library) to stop the Hellmouth from opening.

Eric, Hyde, Fez, Kelso, Bob, and Red head out to the great outdoors. Though everyone better watch out for Kelso and his gun. Red and Eric at the same time hunt for deer. Meanwhile Donna, Laurie, Jackie, Midge, and Kitty stay home and play poker.

Angel is having horrific dreams in which he is again an evil vampire who is slaying innocent people. He awakes every time to discover that the murders he dreamed of have occurred, but he can't remember whether he committed them or not.

Mac is assigned the personally distasteful task of representing a fellow Marine who is appealing his death sentence for the murder of three other Marines. She believes that the defendant, Kenneth Farmer, should receive the death penalty, but she must argue otherwise in court. Brumby, who doesn't believe in capital punishment, must argue in favor of it.

The program chronicles a successful 1999 NOVA expedition to investigate the mysterious disappearance of George Mallory and Andrew Irvine high on Everest in 1924. During this expedition, which included a NOVA/PBS Online Adventure, Mallory's body was found, though the mystery only deepened.

Tonight, Malcolm in the Middle star Frankie Muniz.

Armando authorizes Hugo to take two of the three models for sizing and orders him to find one with an ad in the newspaper. Betty intercedes for Aura María with Armando and he orders Gutiérrez to readmit her, but Gutiérrez blackmails her and asks her out that night to negotiate her readmission.