While Charlie is distracted with the birth of his first grandchild, son Jimmy impersonates his father in order to investigate a murder aboard a freighter in the harbor.
| Writing | Earl Derr Biggers | Characters |
| Writing | Charles Belden | Screenplay |
| Directing | H. Bruce Humberstone | Director |
| Art | Thomas Little | Set Decoration |
| Art | Richard Day | Art Direction |
| Costume & Make-Up | Helen A. Myron | Costume Design |
| Sound | William H. Anderson | Sound |
| Art | Haldane Douglas | Art Direction |
| Camera | Charles G. Clarke | Director of Photography |
| Editing | Nick DeMaggio | Editor |
| Sound | Joseph E. Aiken | Sound |
| Production | Sol M. Wurtzel | Producer |
