In "Light Bulb," the teachers of Abbott Elementary try to come up with creative ways to teach their students about the importance of energy efficiency. Meanwhile, Janine (Quinta Brunson) tries to get her classroom in order, and Barbara (Sheryl Lee Ralph) deals with a surprise visit from her old flame.
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You're referring to the third episode of the first season of the TV show "Abbott Elementary"! abbott elementary s01e03 h265