The small-town prudes of Lynnfield are up in arms over 'The Sinner,' a sexy best-seller. They little suspect that author 'Caroline Adams' is really Theodora Lynn, scion of the town's leading family. Michael Grant, devil-may-care book jacket illustrator, penetrates Theodora's incognito and sets out to 'free her' from Lynnfield against her will. But Michael has a secret too, and gets a taste of his own medicine.

A New York radio personality travels to the small town of Fernville to oversee a contest to identify retired safecracker Jimmy Valentine, believed to be living there under an assumed name. The close-knit town of upstanding citizens is understandably upset by this venture, all the moreso when some of its citizens begin to be murdered. The radio personality and the local newspaper's young daughter collaborate on solving the murders while revealing Valentine, who has become one of the suspects.

During the Nazi occupation of Poland, an acting troupe becomes embroiled in a Polish soldier's efforts to track down a German spy.

The Invisible Man's grandson uses his secret formula to spy on Nazi Germany.

When he unwittingly sends some of his men into a trap, pirate Captain Peter Blood decides to rescue them. They've been taken prisoner by the Spanish Marquis de Riconete who is now using them as slave labor harvesting pearls from the sea.

Rancher Timothy Wade is ambushed by a masked man riding a pinto horse. His young son, Buzzy Wade and the loyal ranch foreman, Dude Bates, are mystified as to who anyone would kill Wade. But, Jim Dana, a U.S. government undercover agent, has his suspicions that the reason may have been in order to acquire the ranch from Buzzy and his older sister, Ruth. Dana thinks the ranch may have a large deposit of a mineral useful to a foreign country. His suspicions are confirmed when a couple of guys with heavy-accents show up inquiring about the property.

In 1690, years have passed since Captain Blood was pardoned by the Crown for his daring deeds against the Spanish on the Spanish Main, and he is living quietly on his plantation in the West Indies, practicing medicine and planning his marriage to Isabella. But his peaceful existence is shattered when Hilary Evans arrives and arrests him on a piracy charge. Somebody has been raiding the islands, and making it appear it was Captain Blood. In order to prove his innocence, Captain Blood has to sail again under the "Jolly Roger."

June McCarthy has unwittingly aided an undercover Nazi naval officer with acquiring a "mother ship" for German submarines in the Atlantic.

Based on a true incident that occurred in 1942 when nine Nazi saboteurs were put ashore on the coast of Long Island, New York, by submarine, with orders to blow up various defense installations.

A carnival girl pretends to be Swedish in order to win a movie role.