Cast & crew
Ellery Queen and the Murder Ring (1941)
Directed by James P. Hogan Written by Eric Taylor, Gertrude Purcell, Manfred Lee, Frederic Dannay
Cast
| Leon Ames | Austin Stack |
| Ralph Bellamy | Ellery |
| Margaret Lindsay | Porter |
| Charley Grapewin | Queen Marlena |
| Mona Barrie | Tracy |
| Paul Hurst | Arlyn Page |
| James Burke | Sgt. Taggart |
| Pierre Watkin | Abb Crothers |
| Byron Foulger | Orderly |
| George Zucco | Edwin |
| Blanche Yurka | Augusta |
| Charlotte Wynters | Aja Fox |
| Tom Dugan | Thomas |
| Olin Howland | Byron Williams |
| Dennis Moore | Dr Chaleck |
| Jean Fenwick | Austin Stack |
Crew
| Eric Taylor | Screenplay |
| Gertrude Purcell | Screenplay |
| James S. Brown Jr. | Director of Photography |
| James P. Hogan | Director |
| Manfred Lee | Story |
| Frederic Dannay | Story |