- HD 1080
- Runtime: 60m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: William Beaudine
- Stars: Helen Parrish, Dick Purcell, Tim Ryan, Frank Faylen, Johnny Duncan
- keywords: secret passage, murder, investigator, grabbed from behind
- Production_studio: Monogram Pictures
- Slogan: IT'S MURDER!...and it's HORRIFIC!
- providers: Amazon Prime Video, fuboTV, Epix Amazon Channel, MGM Plus Roku Premium Channel, MGM Plus, Amazon Prime Video with Ads
- The The Mystery of the 13th Guest is featured in the top rankings of 1943
- #16 in Top Crime Movies of 1943
- #21 in Top Mystery Movies of 1943
A woman of twenty-one opens her grandfather's will left to her thirteen years earlier, per his instructions. Murder soon follows.