George Peppard (1st Lt. John Curtis)
Trevor Howard (Professor Lindemann)
John Mills (General Boyd)
Sophia Loren (Nora)
Allied agents attempt to infiltrate the Nazis' rocket research site.
Two photos on the wall at center-left. Maybe a Lockheed Ventura variant for the lower one?
Registration G-ASJV, code MH434, c/n CBAF.IX.5562 built in 1943. Same aircraft in other works at IMPDb: Frequently Seen Aircraft (Military Fixed-Wing).
Code PA474, c/n VACH0052/D2973 built in 1945.
Models used for the exteriors in this later sequence.