Roland Winters
— Charlie Chan
Wanda McKay
— Evelyn Manning
Mantan Moreland
— Birmingham Brown
Victor Sen Yung
— Tommy Chan (as Victor Sen Young)
Bruce Kellogg
— Talbot Bartlett
Tim Ryan
— Vincent O'Brien / Lt. Mike Ruark
Evelyn Brent
— Sister Teresa
Ralph Dunn
— Jim. Driscoll
Lois Austin
— Mrs. Margaret Driscoll
Forrest Taylor
— Mr. Manning
Lee 'Lasses' White
— Pete
Arthur Berkeley
— Townsman (uncredited)
Edmund Cobb
— Miner (uncredited)
Geraldine Cobb
— Girl in Riding Clothes (uncredited)
Babs Cox
— Bathing Girl (uncredited)
Sam Flint
— Dr. Groves (uncredited)
Lee Tong Foo
— Wong Fai (uncredited)
Michael Gaddis
— Pursuer (uncredited)
Jack Gargan
— Man in the Darkness (voice) (uncredited)
Mary Ann Hawkins
— Bathing Girl (uncredited)
Shep Houghton
— Dude Ranch Guest (uncredited)
John Merton
— Miner (uncredited)
Suzanne Ridgway
— Dude Ranch Guest (uncredited)
Martin Strader
— Henchman (uncredited)