(uncredited)
A mysterious plague, the Purple Death, ravages the earth. Dr. Zarkov, investigating in his spaceship, finds a ship from planet Mongo seeding the atmosphere with dust. Sure enough, Ming the Merciless is up to his old tricks. So it's back to Mongo for Flash, Dale, and Zarkov, this time with ready-made allies waiting: Prince Barin of Arboria and Queen Fria of the frozen northern land of Frigia; where, it so happens, is found polarite, antidote to the plague. But Ming will use all his forces to keep our heroes from thwarting his plans of conquest.
Florabelle Higgins - Miss Tulsa (uncredited)
Joel & Garda Sloan, a husband and wife detective team, who also sell rare books in New York, take a vacation to Seaside City. At Seaside, Joel's pal, Mike Stevens is managing and preparing for their beauty pageant. Joel is made one of the judges plus he has invested $5,000 in it, to Garda's dismay. Eric Bartell, promoter, arrives to dupe Stevens. When Ed Connors, New York racketeer arrives, Bartell is mysteriously murdered. Joel and Garda set out to investigate the murder.
Girl (uncredited)
A happily married woman lets her catty friends talk her into divorce when her husband strays.
Minor Role
Studio publicist discovers Minnesota skating teacher and takes her to Hollywood. She goes back to Minnesota but he follows her.
Third Passenger
Movie star Brooks Mason tries to avoid his fans and spend some weeks on vacation. When Hawaiian plantage-owner George Smith is mistaken by Mason's fans for Mason and brought to Mason's home. They decide to change their identities for a few weeks. But George Smith is mobbed by Mason's fans again on a personal appearance tour in New York, Mason falls in love to dancer Dorothy March, who also is on her way to Hawaii. Problems for Mason arise due to the fact that Smith is engaged with Cecilia Grayson, and her wealthy father believes, that Smith has double-crossed him. Mason isn't able to establish a connection with Smith in New York due to his agent's orders.
Girl in Band
American theatrical manager (Menjou) discovers Henie preparing for the Olympics in Switzerland and brings her to Madison Square Garden.
