Everyone is celebrating their invitation to the Koala Brothers' homestead for Christmas when bad news arrives: Penny the penguin is stuck at the South Pole and won't be able to join them! Frank and Buster embark on their longest and most perilous journey ever to fetch Penny and to give her the best Christmas present ever!

• Keith Wickham
• Rob Rackstraw
• Lucinda Cowden
• Janet James
• Jonathan Coleman