The Zeppo . . . .

Feeling left out by the gang, Xander befriends a psychotic student named Jack O'Toole. When Jack raises his friends from the dead, Xander prevents the gang of zombies from blowing up Sunnydale High, while Buffy, Faith, and the rest of the gang - oblivious to Xander's dangerous adventure - prevent an apocalyptic demon cult from reopening the <DEADILNK entry_key="Hellmouth (Buffyverse)">Hellmouth</DEADILNK> under the Sunnydale High library.

Expanded overview

While the Scooby gang slaughters demons in an underground nest, Xander manages to get himself hurt. Buffy suggests he stay out of the fighting. Xander is desperate to find his place after his breakup with Cordelia and the alienation from his friends. When another student throws him a football, he misses and it hits Jack O'Toole's lunch, resulting in Jack threatening to beat him up. Cordelia, having witnessed the entire event, tells Xander he is useless: "You're the Zeppo". Meanwhile, Giles informs Buffy that the end of the world is near. A group is planning to reopen the Hellmouth and bring forth the demons it contains.

After a discussion with Oz about what makes someone cool, Xander gets himself a car that he believes will give him something unique. While getting donuts for the rest of the researching gang, Xander meets a girl who likes his car and wants to go for a ride, but as it turns out, the car really is the only thing she's interested in. At the Bronze that night, Xander rear-ends Jack sitting in a parked car. A cop shows up, Xander covers for Jack and the two and Car Girl leave to go get the rest of Jack's friends - who, being dead, need to be raised from their graves.

At the library, Buffy, Willow and Giles are researching, while Oz - in werewolf mode - is freaking out in his cage. Willow thinks it's because he can sense trouble. Giles leaves to try and contact some spirits and hopefully get their help with stopping the Sisterhood of Jhe, a group of fierce demons (of the same sort as the ones that the gang killed in the cave a few days before) that plans to end the world.

Xander, now "Car Guy" for Jack and his friends takes them to get supplies to "bake a cake," or rather build a bomb. While the boys are getting the supplies from a hardware store, Xander spots Willow leaving the magic shop and she, thinking the world may end, tells him she loves him. After Jack and friends decide to initiate Xander into the club by killing him and then raising him again, he runs and manages to escape in his car. He rescues Faith, who was fighting off the demons and then takes her to her apartment and she persuades him to sleep with her. She kicks him out, clothes in hand, quickly after.

Xander, after realizing Jack built a bomb at Sunnydale High, heads towards the school to stop it. After disposing of Jack's friends, Xander heads down to the boiler room to defuse the bomb. Jack shows up, and after a fight between the two, Xander asks Jack who is more afraid of death. Jack points out that he's already dead, but Xander points out that "'walking around drinking beer with your buddies'-dead is a lot different from 'being blown up and swept up by a janitor'-dead." When Jack confronts Xander about dying, Xander merely remarks, "I like the quiet" and stares at him calmly. Jack defuses the bomb with seconds to spare. Xander leaves Jack there, who, upon opening a side door is mauled by Oz in his werewolf form. Meanwhile, Buffy, Angel, Faith, Giles and Willow are at the library fend off the giant multi-headed monster and members of the group of female demons and successfully close the Hellmouth.

The next day, Xander decides to keep his harrowing night to himself. Cordelia once again taunts Xander about him being left out of his circle of friends. But instead of lashing back at her, Xander just smiles and quietly walks by the bewildered Cordelia, now a better and confident person.

Found and [c] to http://www.answers.com/topic/the-zeppo-1