Atlantis: The Lost Continent (1961)

Starring Anthony Hall, Joyce Taylor, John Dall, Bill Smith, Edward Platt
Directed by George Pal
(actor & director credits courtesy IMDB.com)

A Greek fisherman rescues a shipwrecked woman, who reveals she's a princess of Atlantis, and guides him to her advanced but cruelly ruled kingdom.

Producer/director George Pal's follow-up to the better regarded The Time Machine, this picture isn't quite of the same quality, but is still a fun adventure.  Shaping the fall of Atlantis as a cautionary tale for the power hungry, the film doesn't focus too much on the benefits of Atlantis' advanced civilization in favor of presenting its excesses, like the slavery of foreigners and the transformation of its slaves into literal beasts of burden.  As a consequence we don't really get to see enough of the world that Pal and his crew have created before it's destroyed, but the romance of the young people at the heart of the story works well enough, and there's thrills a plenty from young hero Demetrios' battle to win his freedom and free his fellow captives.

13 Frightened Girls! (1963)

Starring Murray Hamilton, Joyce Taylor, Hugh Marlowe, Khigh Dhiegh, Kathy Dunn
Directed by William Castle
(actor & director credits courtesy IMDB.com)

An American diplomat's teenage daughter studies up on espionage and becomes a secret and successful spy, but doesn't plan on the dangers she will encounter.

Although the screenplay sometimes borders on the ludicrous, this is a very fun picture with Dunn winning the audience over with a charming and engaging performance.  Although I've seen it grouped in with Castle's horror films, it definitely isn't one, but succeeds on its own merits, with some talented young actresses joining Dunn in the cast.  It paints the Chinese as villains in rather broad strokes when judged by modern standards, but fortunately avoids any kind of racist propaganda.  I enjoyed it, and appreciated the filmmakers' avoidance of the most predictable conclusion.