Expresso pur jus de cerveau

A delivery error causes a coffee to turn its drinkers into zombies. The principal of White Chapel High has a whole case delivered for the teachers and all the teachers turn into zombies. Sarah, Ethan and Benny split up to find a cure. Benny is bitten but remains normal long enough to escape to the chemistry lab with Ethan. After inspecting the coffee's molecules, Ethan determines that the zombies are averse to cold temperatures. They decide to blast the air conditioning to subdue the zombies. In the A/C control room, Sarah is attacked by a zombified Rory. She slams him against the A/C switch, causing the A/C to turn on. The zombies become normal again.
Kate Todd as Erica does not appear in this episode.

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S01E12 - Trois Geeks et un démon