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Harry Townes as Jim Benedict |
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John Agar as Col. Matthews |
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Whitney Blake as June |
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Cecil Kellaway as Dr. A.A. Andrews |
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Charles Aidman as Dave |
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Gail Kobe as Kim |
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Edward Platt as Dr. Easton (as Edward C. Platt) |
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William Traylor as Space Ship Crew |
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John Clarke as Space Ship Crew |
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Joel Lawrence as Space Ship Crew |
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Jon Lormer as Prof. Logan |
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Robert Cornthwaite as Sen. Royce |
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Sam Edwards as Technician (uncredited) |
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Frank Gerstle as Member of Senate Investigating Committee (uncredited) |
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Biff McGuire as Technician (uncredited) |
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Ed Prentiss as Mr. Duffy (uncredited) |
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Bert Remsen as Technician (uncredited) |
| Directing | Joseph Pevney | Director |
| Editing | Jerry Webb | Editor |
| Sound | Lyle Figland | Sound |
| Crew | Loyal Griggs | Cinematography |
| Directing | Richard Caffey | Assistant Director |
| Production | James A. Schulke | Supervising Producer |
| Sound | Van Cleave | Music |
| Art | Sam Comer | Set Decoration |
| Art | Hal Pereira | Art Direction |
| Writing | Alford Van Ronkel | Writer |
| Production | Alford Van Ronkel | Producer |
| Art | Ray Moyer | Set Decoration |
| Sound | Winston H. Leverett | Sound |
| Art | Albert Nozaki | Art Direction |
| Costume & Make-Up | Wally Westmore | Makeup Supervisor |
