Lainey is excited to be back to work, but Mellor warns her that being a pal to her students is not a good idea; Principal Glascott introduces the newest science teacher to the faculty, but CB is skeptical of her no-nonsense approach.

Cast: Tim Meadows, Bryan Callen, AJ Michalka, Brett Dier, Thomas Barbusca, Connor Cain, Jay Jay Effron, Kali Hawk, Denny Logan, Bradley Steven Perry, Tom Waters