10 May 1950
The Invisible Monster
Man-woman team of investigators uncover a gang whose mad scientist leader has developed an invisibility chemical and plans to build a mercenary army of invisible men.
The Adventures of Ruth
Daniel Robin has become mixed up with a band of criminals known as "the 13," and is shot when he refuses to do their bidding. His daughter Ruth, brought home from boarding school, reaches his bedside before he expires. He tells her that she will be given thirteen keys. Instructions will be provided with each key and, if she follows the instructions, she will eventually fully learn of her birthright. Many adventures then follow as Ruth attempts to solve the puzzle of each key and establish her true birthright.
Top Billed Cast
Ruth Roland Ruth Robin
Herbert Heyes Bob Wright
Thomas G. Lingham LaFarge, the Hound
William Human Paul Brighton
Charles Bennett Wayman
Helen Case Countess Zirka
Helen Deliane Melody Morne
Charles Belcher 
George Larkin
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