When undergoing a trial run in July of 1938, Mallard achieved the top speed record for steam locomotives at a speed 126 mph, a record which still stands today.
When Thomas visited the National Railway Museum in 1990, Mallard was one of the engines present during his visit.
- Season 3: Percy and Asbestos (does not speak)
- Web Clips: Gina gives Percy some pointers - Meet the Characters! (cameo)
- The model was created from a 2013 Spencer painted by Calebtrain, and the nameplate and numbers will be created by BertramOldWarrior.