Buffy the Vampire Slayer - Season 6 Episode 5 -

As Buffy tries to 'normalize' her new life as a parent and return to college and attempt numerous jobs, she again comes up against the Troika, a group of would-be sorcerers, who test the Slayer by casting spells on her which make her experience time distortions, magically appearing demons and a strange "Groundhog Day" time loop.