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