John Roebling
Owner of Roebling Steel and pioneer of the Brooklyn Bridge. Speaks with a slight German accent. (Age range: 60's)

Charles (C.C.) Martin
First assistant engineer of the bridge project. (Mid to late 30’s)

Haldis Dickey
Owner of a competing steel mill, a shady businessman and long time nemesis of the Roeblings. (50's-60's)

Nathaniel Dickey
Haldis Dickey's more even-tempered son. (Mid 20's to mid 30's)

Horatio Allen
Chairman of the East River Bridge Company and John's friend. (50's to 60's)

Mr. Daniels, Mr. Leonard, Mr. Aiken, Mr. Pullman
Members of the East River Bridge Company. (40's-60's)

E.F. Farrington
Jovial master builder of the project. (Late 40's-50's)

Washington Roebling
John's son and eventual chief engineer of the project. (Low to mid 30's)

Emily Roebling
Washington's strong-willed wife. (Late 20's to mid 30's)

Dr. Andrew Smith
Doctor overseeing the bridge construction. (50's-60's)

Mary Martin
Charles Martin's wife. She believes in a wife's traditional role. (Late 20's to mid 30's)

Woman
A barfly E.F. takes up with. (20's-30's)