Gustav Knuth

~ as ~

Walter Zügel, Caissonarbeiter

Viktoria von Ballasko

~ as ~

Else, seine Frau

Josef Sieber

~ as ~

Richard „Jolly“ Gauter, Caissonarbeiter

Carl Kuhlmann

~ as ~

Hans Riemann, Caissonarbeiter

Hermann Speelmans

~ as ~

Peter Klune

Heinz Welzel

~ as ~

Werner Handrup

Lina Carstens

~ as ~

seine Mutter

Gisela Uhlen

~ as ~

Erika Bartels, seine Freundin

Eduard Wenck

~ as ~

ihr Vater

Annemarie Holtz

~ as ~

ihre Mutter