Sidney Toler as Charlie Chan

Ricardo Cortez as Dr. Ainsley

Phyllis Brooks as Vivian Wells

Slim Summerville as Sheriff Tombstone Fletcher

Kane Richmond as Curtis Whitman

Victor Sen Yung as Jimmy Chan

Pauline Moore as Mary Whitman

Eddie Collins as Cab Driver

Kay Linaker as Mrs. Wayne Russell

Louise Henry as Jeanne Bentley

Robert Lowery as Wally Burke

Charles D. Brown as Police Chief King

Iris Wong as Choy Wong

Morgan Conway as George Bentley

Hamilton MacFadden as Night Clerk

Jimmy Aubrey as Me #3 Son Wiseguy

Brooks Benedict as Man in Line-Up

Stanley Blystone as Lineup Officer

Heinie Conklin as Policeman

Jerry Frank as Bar Patron

Bobby Hale as Mr. Jones (uncredited)

Chuck Hamilton as Policeman

Harry Hayden as Chemistry Professor

Dick Hogan as Jack - College Student

Fred Kelsey as Reno Desk Sergeant (uncredited)

Al Kikume as Honolulu Policeman (uncredited)

Hank Mann as 'Injured' Con Man / Casino Extra

Imboden Parrish as Undetermined Role

Jack Perry as Rough Drunk (uncredited)

Arthur Rankin as Bellhop

Virginia Sale as Maid Reporting Missing Passkey

Edwin Stanley as Police Chemist

Blue Washington as Man in Line-Up

Robert Shaw as College Student (uncredited)

Barbara McLean as College Student (uncredited)

Dick Cherney as Casino Patron (uncredited)