13 Frightened Girls

“The big fright! The eerie sight!”

At a Swiss school for diplomats' daughters, the American ambassador's teenage daughter starts spying, using her friends' access to the embassies their fathers run. Wally Sanders (Murray Hamilton) and the American agent John Hull (Hugh Marlowe) are working the same ground, with Kang (Khigh Dhiegh) somewhere in the mix. William Castle fills the school with girls from a dozen countries, and the girl at the center is at once the one watching and the one being watched.