Casts
Frederick Culley
as Roger Bacon
Laurence Olivier
as Vincent Lunardi
Franklin Dyall
as Jerome de Ascoli
Hay Petrie
as Tiberius Cavallo
John Turnbull
as Von Zeppelin
Alan Wheatley
as Giovanni Alfonso Borelli
John Abbott
as Jean-François Pilâtre de Rozier
Charles Frend
as Narrator (voice)
Edward Ashley
as (uncredited)
Andrea Checchi
as Zoroastro (uncredited)
