El Shaitan, a bad guy, frames Tom Wayne for murder in the Arabian desert and Tries wipe out the Foreign Legion. Tom Wayne must find his ID. 1933 Mascot Pictures 15 episodes

Taken from wikipedia: The Green Hornet Strikes Again! (1941) is a Universal movie serial based on the The Green Hornet radio series by George W. Trendle. It's a sequel to the earlier, 1940 serial The Green Hornet. This was Universal's 117th serial (the 49th with sound) of the 137 the studio produced. The plot involves racketeering and is unusual for a film serial in having mostly stand alone episodes instead of a continuous story (although this was also the case for the original Green Hornet serial).

Taken from wikipedia.org J. A. Marsden aims to take over the California-Yucatan Railroad with the aid of his henchman El Lobo. The rightful owners, Joyce and Phillip Andrews, naturally object. Their parter, Don Manuel Vega summons his nephew, James Vega, to help them as he is the great grandson of the original Zorro, Don Diego de la Vega. He is disappointed, however, to find that his nephew is a foppish dandy.

Mascot 1935, Marine Corps, Corporal Larry Grant and Sergeant "Mac" McGowan, team up to hunt down "The Tiger Shark," a mad, scientific wizard.

Barbara Meredith takes on the guise of "The Black Whip" to avenger her bother's murder, in this 12 part Universal serial. Zorro's Black Whip: Chapter 1 - The Masked Avenger
Zorro's Black Whip: Chapter 2 - Tomb of Terror
Zorro's Black Whip: Chapter 3 - Mob Murder

"Britt Reid," the millionaire publisher, dons a mask and goes out to fight crime in his famous automobile, "The Black Beauty." "Kato," the Korean science wizard, whom "Britt" saved from attackers years ago, has now pledged his life to serving "Reid" any way he can. Each chapter opens with the familiar Green Hornet theme, "Flight Of The Bumblebee." This is the first of two film serials distributed by Universal Pictures. 13 chapters total; 3/13.

Taken from IMDB: US naval officer Don Winslow is given command of the islands near Pearl Harbor. He discovers that there is a ring of saboteurs and enemy agents who are trying to destroy ships carrying supplies to the troops stationed in the islands and sabotage the war effort. He sets out with his trusted assistant and two beautiful women to find the mastermind behind these nefarious activities.

Ray 'Crash' Corrigan, a recent graduate of Annapolis, travels with Professor Norton, his Son Billy, and plucky reporter Diana Compton to the Undersea Kingdom of Atlantis to locate the cause of series of earthquakes. When they arrive Crash and his friends become embroiled in battle between warring Atlanteans.

Tarzan heads to Guatemala to look for his friend, D'Arnot and helps Major Matling search Mayan ruins for hidden jewels and an idol holding the formula for an explosive. Guatemalan police pursue Alice and Gordon assuming them as spies. Ula Vale as a mysterious figure is revealed in the final episode to be an undercover government operative. 12 chapters,

Taken from IMBD: Marjorie Temple, owner of a bus line and an apparently worthless plot of land, is set upon by rich oil speculators who know her land actually is worth millions. When they try to put her out of business for good, young race driver Burn 'em Up Barnes comes to her rescue - again and again and again. This is a 12 part serial. Links to all chapters are available below.