An English pacifist's (John Mills) sons run away from school and hijack a plane to Vienna to petition for peace.
John Mills
John Hampden
Yvonne Mitchell
Mrs. Stella Hampden
Alastair Sim
Dr. Skillingworth
Jeremy Spenser
L. W. Daventry
Andrew Ray
Max Hampden
Peter Asher
Johnny Hampden
Marie Lohr
Grandmother
Sonia Williams
Miss Betts
