Directed by
| Charles Nichols | ... | (as Charles A. Nichols) |
Writing Credits (in alphabetical order)
| Willie Gilbert | ... | (writer) |
| Sam Locke | ... | (writer) |
| Paul Roberts | ... | (writer) |
| Maurice Tombragel | ... | (writer) |
| Hendrik Vollaerts | ... | (writer) (as Rik Vollaerts) |
| Carey Wilber | ... | (writer) |
| Shimon Wincelberg | ... | (writer) |
Cast
| Norman Alden | ... | Henry 'Hank' McSummers (voice) | |
| Michael Bell | ... | Ernie Devlin (voice) | |
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Philip L. Clarke | ... | Additional Voices (voice) |
| Don Diamond | ... | Additional Voices (voice) | |
| Micky Dolenz | ... | Tod Devlin (voice) | |
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Sarina C. Grant | ... | Additional Voices (voice) |
| Bob Hastings | ... | Additional Voices (voice) | |
| David Jolliffe | ... | Additional Voices (voice) | |
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Robie Lester | ... | Maria (voice) |
| Stanley Livingston | ... | Additional Voices (voice) | |
| Derrel Maury | ... | (voice) | |
| Barney Phillips | ... | Additional Voices (voice) | |
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Michelle Robinson | ... | Sandy Devlin (voice) |
| Fran Ryan | ... | Additional Voices (voice) | |
| John Stephenson | ... | Additional Voices (voice) | |
| John Tuell | ... | (voice) | |
| Ginny Tyler | ... | Aunt Martha / Polly (voice) | |
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Don Weiss | ... | Additional Voices (voice) |
| Jesse White | ... | Additional Voices (voice) | |
Produced by
| Joseph Barbera | ... | executive producer |
| William Hanna | ... | executive producer |
| Iwao Takamoto | ... | creative producer |
Music by
| Hoyt Curtin | ||
Production Design by
| Bob Singer | ||
Production Management
| Jayne Barbera | ... | assistant production manager |
| Joed Eaton | ... | post-production supervisor |
| Victor O. Schipek | ... | production supervisor |
| Art Scott | ... | production manager |
Art Department
| Cullen Blaine | ... | storyboard editor (as Cullen Houghtaling) |
| Alex Lovy | ... | storyboard editor |
| Jay Sarbry | ... | storyboard editor |
| George Singer | ... | storyboard editor |
| Irv Spector | ... | storyboard editor |
Sound Department
| Wally Burr | ... | recording director |
| Ron Fedele | ... | sound effects editor |
| Bill Getty | ... | sound director |
| Richard Olson | ... | sound director |
| Art Scott | ... | recording director |
Camera and Electrical Department
| Gene Gropper | ... | camera operator |
| Curt Hall | ... | camera operator (as John Curtis Hall) |
| Ralph Migliori | ... | camera operator |
| Louis Niemeyer | ... | camera operator |
| Roy Wade | ... | camera operator |
Animation Department
| Alvaro Arce | ... | layout unit manager |
| Ed Barge | ... | animation supervisor |
| Dave Brain | ... | animator (as David Brain) |
| John Bruno | ... | animator |
| Bob Carr | ... | animator (as Robert Carr) |
| Hak Ficq | ... | layout artist |
| Al Gmuer | ... | background artist |
| Bill Hutten | ... | animator |
| Billie Kerns | ... | ink and paint supervisor |
| Lin Larsen | ... | layout artist |
| Bill Lignante | ... | layout artist |
| Tony Love | ... | animator |
| Jack Manning | ... | layout artist |
| Fernando Montealegre | ... | background supervisor (as F. Montealegre) |
| Bill Proctor | ... | background artist |
| Tony Sgroi | ... | layout artist |
| Alex Toth | ... | character designer |
| Art Vitello | ... | animator |
| Robert 'Tiger' West | ... | xerographer |
| Al Wilson | ... | layout artist |
| Allen Wilzbach | ... | animator |
| Deborah Rykoff-Bennett | ... | ink & paint artist (uncredited) |
| Paulette Sommer | ... | ink & paint artist (uncredited) |
| Linn Trochim | ... | assistant animator (uncredited) |
| Hetta Van Elk | ... | ink & paint artist (uncredited) |
Editorial Department
| Larry C. Cowan | ... | supervising film editor |
| William E. DeBoer | ... | negative consultant |
Music Department
| Hoyt Curtin | ... | musical director |
| Paul DeKorte | ... | music supervisor |
| Chip Yaras | ... | music editor |
Additional Crew
| Norman Katkov | ... | story editor |
| Iraj Paran | ... | titles |
| Myles Wilder | ... | executive story consultant |
| Frank Paiker | ... | technical supervisor (uncredited) |