The Koala Brothers

The adventures of Frank and Buster, two intrepid koalas who fly around the Australian outback in their yellow plane, on a mission to help other creatures in need. George rips a hole in his satchel and begins losing letters. The Koalas spy a trail of letters and, keen to help, deliver them. George soon begins to worry that there's another postman operating in the outback. Mitzi and Ned organise a stakeout to see if they can catch the mystery mailman. The Koalas return and the mystery is solved.