Lend Me Your Ear

Summary
Arthur, Buster, and Brain become worried when Mr. Ratburn is not behaving like himself. Normally, he is always pleased to see them. The real reason why comes as a surprise to the boys.

Major

 * Arthur Read
 * Buster Baxter
 * The Brain
 * Nigel Ratburn

Minor

 * Jane Read
 * Vladimir and Estragon
 * The Lost Teachers
 * Trevor Brown
 * Hope Locke

Cameo

 * Molly MacDonald
 * Rattles
 * Angie Vanderloo
 * Bailey
 * Mrs. Powers
 * Mr. Powers
 * Rafi
 * Teenager
 * Peter
 * Unknown Male Bear (Number 6)
 * Caroline or Mrs. Lancaster
 * Unknown Female Adult Rabbit (Number 7)
 * Unknown Female Brown-Haired Rabbit

Mentioned

 * Dr. Conway

Episode connections

 * In Brain's room, Buster plays with a hurricane on Brain's weather globe. This is the same globe from "Shelter from the Storm."
 * Arthur, Buster, and Brain "traveling" into Mr. Ratburn's ear to learn about his hearing impairment is similar to "Buster's Breathless," when the class traveled up Buster's nose to learn about his asthma.
 * Arthur notes Buster's previous theories about Mr. Ratburn, including being an alien (a running gag throughout the series), a nail-eating vampire ("Arthur and the Real Mr. Ratburn"), and a secret superhero ("Mr. Ratburn's Secret Identity").
 * Mr. Ratburn is seen reading "A Brief History of Copper Smelting". He assigned his class a copper smelting diorama project in "Best of the Nest".
 * This is the second time Mr. Ratburn has been seen playing in a band. The first time was in "The Buster Report." It was revealed that he went to band class in high school in "The Butler Did... What?"

Cultural references

 * The episode title is based on a quote from Willam Shakespeare's play Julius Caesar.