Donald Briggs
Frank Merriwell (as Don Briggs)
Jean Rogers
Elsie Belwood
John 'Dusty' King
Bruce Browning (as John King)
Carla Laemmle
Carla Rogers
House Peters Jr.
House Peters
Herschel Mayall Jr.
'Hersh' Mayall
Wallace Reid Jr.
Wally Reid
Edward Arnold Jr.
Eddie Arnold
Bryant Washburn Jr.
Bryant Washburn
Allan Hersholt
Allen Hersholt
Carlyle Blackwell Jr.
Carlyle Blackwell
Peter Gowland
Peter Gowland
Sumner Getchell
Harry
William P. Carleton
Charles Merriwell
Ben Hewlett
Daggett
Ella Ethridge
Mrs. Mary Merriwell
Walter Law
Murray Belwood
Jack Donovan
Coach Harding
Al Bridge
Henchman Black
Sam McDaniel
Jeff
King Baggot
Chemistry Professor
Chief John Big Tree
Indian John
Lynton Brent
Helpful Driver
Viola Callahan
Mrs. McLaw
Edmund Cobb
Pete
Jim Corey
Bill / Stalking Indian
Richard Cramer
Road Crew Foreman
Joseph De Grasse
Dr. Cummings
William Desmond
Captain of the 'Viking'
Al Ferguson
Big Tom
Billy Franey
Barbecue Cook
M.J. Frankovich
Baseball Game Announcer
Chester Gan
Lumber Camp Cook
June Gittelson
Dance Party Guest
Frank Hagney
Slout
Jack Hall
Theater Doorman
Millard 'Dixie' Howell
Football Player
Dickie Jones
Jimmy McLaw
Eddie Kane
Man in Audience (archive footage)
Eddie Kane
Dave
Isabel La Mal
Mrs. Belwood
Bruce Lane
Yacht Captain
Charles Lane
Man in Front Row (archive footage)
Nick Lukats
Second Mate of the 'Viking'
Philo McCullough
Berger
Monte Montague
Monte
Carlos Montalbán
Rurale Captain
Charles Murphy
Yacht Crewman
Dave O'Brien
George Baldwin
Artie Ortego
Indian
Bud Osborne
Gorman
Rain-in-the-Face
Chief Tonaka
Fred Sumner
Prof. Baldwin
Max Wagner
Pug O'Leary
Dick Wessel
Joe
Slim Whitaker
Nolan
Bert Young
Judd
Bob Walker
Lang