Two of Gordon's relatives have appeared in the Railway Series.

Henry was the central character of what might be the most controversial story in the history of the Railway Series.

Gordon was the second engine to appear in The Railway Series.

Other people associated with the Railway Series were also referenced.

The following table lists the titles of all 42 books in the Railway Series.

Unusually for characters in the Railway Series, they carry faces on the back as well as the front.

Edward was the first character created for The Railway Series in 1943.

In the Railway Series, they were painted blue shortly afterwards and given nameplates.

However, this series had more characters, although none from The Railway Series.

Series 4 was almost entirely based on The Railway Series.