Briar's Teeth/Substitute Teacher Briar has toothache. Vick tells him that bugs are eating his teeth which makes him very anxious. He tries really hard to get rid of the bugs but eventually he has to visit Nurse Beakman. Miss Olivia is unavailable for class today, so Old Billy becomes a substitute teacher. At first, the cubs are no interested in Old Billy's lesson, but in the end he manages to win them over.