Mystery In Swing (1940)

Starring:

• Monte Hawley
• Marguerite Whitten
• Tommie Moore
• Edward Thompson 
• Buck Woods 
• Jess Lee Brooks 
• Josephine Edwards 
• Sybil Lewis

Storyline
Debonair crooner Prince Ellis strides across the stage like royalty at his nightclub, where he's the focus of everyone's attention. Men envy him and women want to be with him, especially young Linda Carroll, who ignores repeated warnings to steer clear of the singer's seductive allure. Linda's father, John, strongly disapproves of Prince Ellis' unwholesome attention to his virginal daughter. When Ellis is gunned down, John is the obvious suspect, but it turns out many people wanted the star dead for their own reasons. 

Son of Ingagi (1940)

Starring:

• Zack Williams
• Laura Bowman 
• Spencer Williams 
• Alfred Grant 
• Daisy Bufford 
• Earle Morris

Storyline
A wealthy old recluse wills her fortune and exceedingly-gloomy house to a pair of newlyweds, Robert and Eleanor Lindsay. Years before, Dr. Jackson had been in love with Eleanor's father, who was younger than her and did not return her love. N'Gina, an ape-man, Dr. Jackson brought back from Africa drinks a potion she had concocted in her laboratory, for a specific reason, but N'Gina turns on her and kills her, which is not what she had planned. Then he murders her attorney, Bradshaw, who is hunting for $20,000 in gold she had hidden in her gloomy house. Her brother, Zeno, an ex-convict, finds the gold but N'Gina isn't bothered by the bullets Zeno fires at him and kills him also. Detective Nelson then goes looking for it. 

The Proud Valley (1940)

Starring:

1. Paul Robeson
2. Edward Chapman
3. Simon Lack

IMDB.com
In a Welsh coal mining valley, a young man with a beautiful singing voice is called upon to make the ultimate sacrifice when a pit disaster threatens.