Wally has appeared in the following episodes:
- Series 2 - Wally Waddles In, Deep Sleep, Budgie's Opening Goal
- Series 3 - Boom Boom Budgie, Chuck's Buddy, Put Up or Stuck Up
As stated in his debut episode, Wally is based a Supermarine Walrus. It was implied in the same episode that Wally served the Royal Air Force as was the case for many Supermarine Walruses in real-life. Of the 740 built, only four survive.