Out Of Mind, Out Of Sight - S1-E11
Corrected entry: In 'Out Of Mind, Out Of Sight' Giles says that it's a lack of people noticing her added to the mystical strength of the Hellmouth that turned Marcy invisible, but at the end of the episode it's revealed that there's a whole classroom of people who have turned invisible. How did all of them turn invisible without the Hellmouth's influence?
Correction: At the end of the series you learn that there are other Hellmouths. Giles even states that there's one in Cleveland.
MoonFaery ★