 |
Noah Beery Jr. as Jan Trevor |
 |
Dorothy Short as Mona Andrews |
 |
Harry Woods as Borno |
 |
Bryant Washburn as Dr. Harry Trevor |
 |
Walter Miller as Dr. Frank Bracken |
 |
John Davidson as Prince Samu |
 |
Fred MacKaye as Dr. Charles Phillips |
 |
Viva Tattersall as Georgia Trevor |
 |
William Desmond as Allen |
 |
Grace Cunard as Mrs. Camerford Amster |
 |
Russ Powell as Henry Andrews |
 |
Don Brodie as Dr. Carl Neff |
 |
Harry Worth as Dr. Carl Neff |
 |
Dickie Jones as Jan Trevor as a Boy |
 |
Eddie Kane as Gen. Tichak |
 |
Stanley Andrews as Emperor Mena |
 |
Richard Alexander as Navigator (archive footage) |
 |
King Baggot as Dr. Pierce |
 |
J. Frank Glendon as Speaker at Conference |
 |
Al Ferguson as Guard of Mu |
 |
Eric Mayne as Doctor at Conference |
 |
J.P. McGowan as Freighter Captain |
 |
Charles Murphy as Grubb, Freighter's Mate |
 |
Eddie Parker as Emperor's Guard / Mu Sentry |
 |
Buddy Roosevelt as Batu |
 |
Hal Taliaferro as Lancer Officer-in-Charge |
 |
Gwendolyn Logan as Mrs. Henry Andrews |
|
H. Burroughs as Kutu |
| Directing | Lew Landers | Director |
| Writing | Basil Dickey | Writer |
| Production | Milton Gatzert | Producer |
| Crew | William A. Sickner | Cinematography |
| Editing | Alvin Todd | Editor |
