Cast & crew
The Second Floor Mystery (1930)
Directed by Roy Del Ruth Written by Joseph Jackson
Cast
| Grant Withers | Geoffrey |
| Claude King | Enright |
| Claire McDowell | Hattie |
| Sidney Bracey | Alfred |
| John Loder | Fraser |
| H.B. Warner | Bill Bray |
| Loretta Young | Ferguson |
| Crauford Kent | Fraser |
Crew
| Samuel Kaylin | Original Music Composer |
| Barney McGill | Director of Photography |
| Louis Silvers | Music Director |
| Clifford A. Ruberg | Sound Engineer |
| Roy Del Ruth | Director |
| Earl Derr Biggers | Novel |
| Joseph Jackson | Writer |
| R. H. Bassett | Music |
| William Holmes | Editor |