Donald and Douglas are Scottish twins.
Appearences
- Season 1 - Oliver and the Snowstorm, A New Branch Line, Douglas and the Signal, and Sidney Helps Out
- Season 2 - Sodor Snowstorm, The Ironworks Diesels, Trust Paxton, The Crashing Kipper (Donald; Douglas cameo) Tender Engines Don't Shunt!, and Sidney's First Christmas (cameo)
- Season 3 - Stealing Trains, Tender Trouble, Frozen Points, and Hector the Ballast Hopper
- Season 4 - King of the Roads, Quack! (Douglas only), Thomas Does His Thing, Henry Goes Out of Town (cameo), and Donald, Douglas and Caitlin
- Season 5 - Improper Engines (Donald only), Diesel Domination (cameo), Be On Your Guard!, Harvey and the Railway Inspectors (cameo), and "It's A Great Story After All....."
- Season 6 - Forest Fire, Triple Trouble (Donald; Douglas cameo),
- They are likely to appear again.
| North Western Railway |
|---|
| Thomas • Edward • Henry • Gordon • James • Percy • Toby • Duck • Donald and Douglas • Oliver • Barry • Charles • Charlie • Eagle • Daisy • BoCo • Bear • Pip and Emma • Jason • Derek • Diesel 10 • Splatter and Dodge • Salty • Emily • Harvey • Arthur • Fergus • Murdoch • Diesel • Molly • Neville • Dennis • Rosie • Whiff • Billy • Hank • Flora • Scruff • Den • Dart • Norman • Paxton • Sidney • Belle • Porter • Gator • Patriot • Dave • Mark • Wilson • Brian • Vegard • Stafford • Jonathan • Phillip • Winston • Flynn • Brandon |