When Jack leaves his class unattended, a student injury sets off an official investigation and lands Jack in "teacher jail." An aggressive teacher's union rep sets her sights on Principal Durbin. The students' excitement for a substitute teacher are dashed when they find out it's Helen.
Elenco: Glenn Howerton , Patton Oswalt , Tucker Albrizzi , Mary Sohn , Aparna Brielle , Lyric Lewis , Jessica Garza , Sari Arambulo .