Names
Places
Trains
Non-Train Characters
100
The blue number one train.
Who is Thomas?
100
The island that the show takes place on.
What is Sodor?
100
Let's just say he's square!
Who is Toby?
100
The character nicknamed "The Fat Controller".
Who is Sir Topham Hatt?
200
The red number five train.
Who is James?
200
Where the trains go at night.
What is Tidmouth Sheds?
200
Thomas's closest friend.
Who is Percy?
200
They were originally called "Foolish Freight Cars" in the U.S. narration.
Who are the Troublesome Trucks?
300
The helicopter.
Who is Harold?
300
The name of a train or crane that works at Brendam Docks.
Who is Salty, Porter, Cranky, Big Mickey, or Carly?
300
The number of the evil diesel with a claw.
What is ten?
300
One of the buses on Sodor.
Who is Bulgy or Bertie?
400
The name of this train: 
Who is Emily?
400
One of the two main towns on Sodor.
What is Knapford or Tidmouth?
400
The train nicknamed "The Flying Scotsman" is the brother of this fast train.
Who is Gordon?
400
The tractor on Sodor.
Who is Terence?
500
The jet plane at Sodor Airport.
Who is Jeremy?
500
The quarry at the end of Thomas's route.
What is Ffarquhar Quarry?
500
The royal blue conjoined twins on Sodor.
Who is Mighty Mack?
500
The first name of Sir Topham Hatt.
What is Charles?