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Thunder the Dog as Black Lightning (as Thunder the Marvel Dog) |
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Clara Bow as Martha Larned |
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Harold Austin as Roy Chambers |
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Eddie Phillips as Ez Howard |
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Joe Butterworth as Larned / Dick |
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Mark Fenton as Doctor |
|
John Gilbert as City Doctor |
| Directing | James P. Hogan | Director |
| Writing | Dorothy Howell | Writer |
| Writing | Harry Davis | Story |
