- Country: USA
- Genres: Comedy, Mystery
- Release: 1930-04-26
- Director: Roy Del Ruth
- Writers: Earl Derr Biggers , Joseph Jackson
- Language: English
- Stars: Grant Withers , Loretta Young , H.B. Warner (1875–1958) , Claire McDowell , Sidney Bracey , Crauford Kent , John Loder (1898–1988) , Claude King , Judith Vosselli , Cosmo Kyrle Bellew
- Runtime: 58 min
- Awards: N/A
- AKA: Het geheim van de tweede etage (Netherlands the) , The Second-Story Murder , The Second Floor Mystery , The Second Story Murder (United States of America) , The Second Floor Mystery (United Kingdom) , The Second Floor Mystery (United States of America) , Het mysterie van de tweede verdieping (Netherlands the)
- Plot: Based on a book by Earl Derr Biggers, "The Agony Column".
- IMDB:tt0021351
The Second Floor Mystery Cast · · · ALL
Roy Del Ruth
Director
Grant Withers
Geoffrey West
Loretta Young
Marion Ferguson
H.B. Warner
(1875–1958)
Inspector Bray
Claire McDowell
Aunt Hattie
Sidney Bracey
Alfred
Crauford Kent
Capt. Fraser-Freer
John Loder
(1898–1988)
Fraser-Freer's Younger Brother
Claude King
Enright