Invisible Girl

In which Cordy becomes Spring Queen and the target of an invisible stalker. Some girls really do get everything.

From the old WB Buffy website:

THE INVISIBLE GIRL - Buffy and Cordelia become unlikely allies to combat an invisible spirit that has targeted Cordelia and everyone around her. Meanwhile, Angel goes to Giles to warn him that Buffy could be in grave danger.

Cast:

• Sarah Michelle Gellar as Buffy
• Alyson Hannigan as Willow
• Nicholas Brendon as Xander
  

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• Anthony Stewart Head as Giles
• Charisma Carpenter as Cordelia
• David Boreanaz as Angel
• Mercedes McNab as Harmony
• Armin Shimerman as Principal Snyder
• Clea Duvall as Marcie
• Ryan Bittle as Mitch
• Denise Dowse as Ms Miller
• John Knight as Bud #1
• Mark Phelan as Doyle
• Skip Stellrecht as Manetti
• Julie Fulton as FBI Teacher