Thomas/Polar Bear, Polar Bear What Do You Hear?

Cast

 * Henry as Polar Bear
 * Gordon as Lion
 * Percy as Hippopotamus
 * Mavis as Flamingo
 * James as Zebra
 * Duck as Boa Constrictor
 * Thomas as Elephant
 * Toby as Leopard
 * Emily as Peacock
 * Edward as Walrus
 * Sir Topham Hatt as Zookeeper
 * Narrow Engines as Children