Lend Me Your Ear

Summary
Arthur, Buster and Brain are worried when Mr. Ratburn isn’t acting like himself. Normally, he is always pleased to see them. The real reason why comes as a surprise to them.

Major

 * Arthur Read
 * Buster Baxter
 * Alan Powers
 * Nigel Ratburn

Minor

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

Cameo

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

Mentioned

 * Dr. Conway

Episode Connections

 * 1) In Brain's bedroom, Buster plays with a hurricane on Brain's weather globe. This is the same globe from "Shelter from the Storm."
 * 2) 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 travels up Buster's nose to learn about his asthma.
 * 3) 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").
 * 4) 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".