 | Ralph Byrd | ... | Dick Tracy |
 | Irving Pichel | ... | Nicolas Zarnoff |
 | Ted Pearson | ... | Agent Steve Lockwood |

| Jennifer Jones | ... | Gwen Andrews (as Phyllis Isley) |
 | Walter Miller | ... | Henchman Robal |
 | George Douglas | ... | Henchman Sandoval |
 | Kenneth Harlan | ... | FBI Chief Clive Anderson [Chs. 13-15] |
 | Robert Carson | ... | Agent Scott |
 | Julian Madison | ... | Agent Foster |
 | Ted Mapes | ... | Agent Dan Murchison |
 | William Stahl | ... | Agent Bruce |
 | Robert Wayne | ... | Agent Wilbur |
 | Joe McGuinn | ... | Henchman Tom |
 | Ken Terrell | ... | Henchman Ed |
 | Harry Humphrey | ... | Warden Stover [Chs. 1, 13] |
 | Harrison Greene | ... | Baron [Ch. 14] |
| rest of cast listed alphabetically: |
 | Broderick O'Farrell | ... | Russell (furrier) (scenes deleted) |
 | George Allen | ... | Barge Crewman [Ch. 4] (uncredited) |
 | Reginald Barlow | ... | Dr. Alfred Guttenbach [Ch. 12] (uncredited) |
 | Ed Brady | ... | Henchman-Miner Jonas [Ch. 6] (uncredited) |
 | Robert Brister | ... | Dr. Kranz [Chs. 1, 13] (uncredited) |
 | Earle D. Bunn | ... | Al, Lighthouse thug leader [Ch. 3] (uncredited) |
 | George Burton | ... | (uncredited) |
 | Budd Buster | ... | Cappy, Lighthouse keeper [Ch. 3] (uncredited) |
 | Louis Caits | ... | Jerry, the 'Human Fly' [Chs. 12-13] (uncredited) |
 | Ed Cassidy | ... | Yacht captain [Chs. 3-4] (uncredited) |
 | James Cassidy | ... | Mr. Collins, Aircraft manufacturer [Ch. 8] (uncredited) |
 | Allan Cavan | ... | Second Warden [Ch. 13] (uncredited) |
 | Eddie Cherkose | ... | Thug in ghost town [Ch. 11-12] (uncredited) |
 | George Cleveland | ... | Gramps Williams [Ch. 11] (uncredited) |
 | Edmund Cobb | ... | Lt. Reynolds [Ch. 1] (uncredited) |
 | Tristram Coffin | ... | Emissary Zobar [Ch. 1] (uncredited) |
 | Russell Collier | ... | Police Dispatcher [Ch. 15] (uncredited) |
 | Ken Cooper | ... | Gus, Ghost town thug [Ch. 11] (uncredited) |
 | Alan Davis | ... | Capt. Link [Ch. 1] (uncredited) |
 | George DeNormand | ... | Jack (uncredited) |
 | Charles Dorety | ... | Barge Thug [Chs. 3-4] (uncredited) |
 | Curley Dresden | ... | Thug on boat [Chs. 3-4] (uncredited) |
 | James Fawcett | ... | Thug in house [Ch. 14] (uncredited) |
 | Joseph Forte | ... | Stanton [Ch. 1] (uncredited) |
 | Jerry Frank | ... | Jake, 2nd Truck driver [Ch. 10] (uncredited) |
 | Charles K. French | ... | Doctor [Chs. 1, 13] (uncredited) |
 | Milton Frome | ... | Officer (uncredited) |
 | Bud Geary | ... | Ben, Lumber truck driver [Ch. 7] (uncredited) |
 | Ray Harper | ... | Martin, Stevens' crooked clerk [Ch. 8] (uncredited) |
 | Robert Hartford | ... | Gus, Phony mill foreman [Ch. 7] (uncredited) |
 | Barry Hays | ... | Johnson (uncredited) |
 | Edward Hearn | ... | The Forest Ranger [Ch. 7] (uncredited) |
 | Reed Howes | ... | Slim, the gang pilot [Ch. 5] (uncredited) |
 | Charles Hutchison | ... | Brandon, Salvage yard owner [Ch.4] (uncredited) |
 | Lloyd Ingraham | ... | Judge Stoddard [Ch. 1] (uncredited) |
 | Perry Ivins | ... | Emissary Telef [Ch. 1] (uncredited) |
 | Bob Jamison | ... | Thug at truck [Ch. 1, 13] (uncredited) |
 | Ray Johnson | ... | Phony gas station attendant [Ch. 6] (uncredited) |
 | Jack Kenny | ... | Ward, First truck driver [Ch. 10] (uncredited) |
 | Ethan Laidlaw | ... | Pete, Diving chamber thug [Chs. 6-7] (uncredited) |
 | William Lally | ... | Thug in ghost town [Chs. 11-12] (uncredited) |
 | Harry Lang | ... | Barossa, the Jeweler [Chs. 8-9] (uncredited) |
 | Raymond Largay | ... | Russell, the furrier [Chs. 8-9] (uncredited) |
 | Bert LeBaron | ... | Thug at lighthouse [Ch. 3] (uncredited) |
 | John Locke | ... | Newscaster (uncredited) |
 | Carey Loftin | ... | Trooper on foot [Ch. 15] (uncredited) |
 | Merrill McCormick | ... | Green's assistant [Chs. 9-10] (uncredited) |
 | Millard McGowan | ... | Thug at hangar [Ch. 5] (uncredited) |
 | Sammy McKim | ... | Sammy Williams [Chs. 11-12] (uncredited) |
 | Frank Meredith | ... | Pol. Officer Duffy [Ch. 2] (uncredited) |
 | Walter Merrill | ... | Junior officer (uncredited) |
 | Bruce Mitchell | ... | Prison Guard [Chs. 1,13] (uncredited) |
 | John Moloney | ... | Tim, Reporter [Chs. 1,13] (uncredited) |
 | Monte Montague | ... | Bayside Dock Thug [Chs. 7-8] (uncredited) |
 | Charles Murphy | ... | Stopes, Heavy with three fingers [Ch. 1] (uncredited) |
 | Bill Nestell | ... | Thug in truck [Ch. 1, 13] (uncredited) |
 | Frank O'Connor | ... | Army Captain [Ch. 2] (uncredited) |
 | Eddie Parker | ... | Bayside Dock thug [Chs. 7-8] (uncredited) |
 | Edward Peil Sr. | ... | Price, Printer [Chs. 1,13] (uncredited) |
 | Charles Phillips | ... | Thug on barge [Chs. 3-4] (uncredited) |
 | Allen Pomeroy | ... | Bayside Dock thug [Chs. 7-8] (uncredited) |
 | Stanley Price | ... | Dr. Shang [Chs. 1, 13] (uncredited) |
 | Jack Raymond | ... | Gus Fleming [Ch. 10] (uncredited) |
 | Charles Regan | ... | Thug at dam [Chs. 6-7] (uncredited) |
 | Jack Roberts | ... | Lenny Slade [Ch. 2] (uncredited) |
 | Dick Rush | ... | Police Sergeant [Ch. 15] (uncredited) |
 | Bigelow Sayre | ... | Davis, Autogyro pilot [Chs. 12-13] (uncredited) |
 | Fred Schaefer | ... | Bayside Dock thug [Chs. 7-8] (uncredited) |
 | Gilman Shelton | ... | Joe, Ghost town thug [Ch. 11] (uncredited) |
 | Charles Sherlock | ... | Car 14 Trooper [Ch. 15] (uncredited) |
 | Lee Shumway | ... | Burke, Fish & Game Commissioner [Ch. 2] (uncredited) |
 | Cy Slocum | ... | Thug in house [Ch. 14] (uncredited) |
 | Tom Steele | ... | Lighthouse / House Thug [Chs. 3 / 14] (uncredited) |
 | Charles Sullivan | ... | Brody, Henchman-Cab driver [Chs. 13-14] (uncredited) |
 | Bernard Suss | ... | Emissary Lassen [Ch. 1] (uncredited) |
 | Josef Swickard | ... | Presidente Huenemo Mendoza [Ch. 3] (uncredited) |
 | Al Taylor | ... | Launch Henchman [Chs. 1, 13] (uncredited) |
 | Forrest Taylor | ... | Mr. Stevens, Airplane designer [Ch. 8] (uncredited) |
 | Bob Terry | ... | Benton (uncredited) |
 | Sid Troy | ... | (uncredited) |
 | Sailor Vincent | ... | Intern (uncredited) |
 | Peter von Ziegler | ... | Green, Newsreel Cameraman-thug [Chs. 9-10] (uncredited) |
 | Herman E. Webber | ... | James Robinson [Chs. 9-10] (uncredited) |
 | Wally West | ... | Henchman in Office [Ch. 2] (uncredited) |
 | Bill Wilkus | ... | Thug at hangar [Ch. 5] (uncredited) |
 | Bud Wolfe | ... | Bill, Fur store chemist [Chs. 8-9] / 3rd Ghost town thug [Ch. 11] (uncredited) |
 | Bill Yrigoyen | ... | Howard, Draftsman[Chs. 8-9] (uncredited) |
 | Joe Yrigoyen | ... | Barge Crewman [Ch. 4] (uncredited) |
This video, from a film series made in 1939, is a classic example of a hangover from the silent era for action films, when heros & heroines stood in mortal peril at the end of the film, only to magically escape when the punters returned from their suspense the following week to see what happened in the next serial.This is a classic marketing ploy seen several times in this combined film.
The previous reviewer adequately summarised the plot.I bought it to obtain a copy of the second feature film ever made by Jennifer Jones when she was still Phyllis Isley (her given name).Made at the low budget minded Republic Films, this was her second attempt at Hollywood stardom at Republic, her first & easier to obtain, was "Frontier Horizon" with John Wayne.However, the low status and lack of character depth of roles (not to say money) offered, left her somewhat disillusioned and after this film she returned to New York with her then new husband of that year, Robert Walker, for a second crack at stage stardom on the "Great White Way".
In this film she plays Gwen Andrews, Dick Tracey's girl Friday, a role like Miss Moneypenny in the James Bond saga, you will note was played by another actress from the 1937 series.An interesting example of the serial film genre from the 1930's.