Tony Albertini (1 episode)

(1 episode)

Francis, King of France

Governor (53 episodes)

The Governor (5 episodes)

Commodore

Alice's Father

Steve Scott (27 episodes)

Jonathan Maulle

(1 episode)

Michael Shayne (32 episodes)

Dr. George Lund

(39 episodes)

Sgt. Major Pierre Benet

Jack Marshall (1 episode)

Al Reynolds

Dr. Mark Andrews (1 episode)

Jim Kendall (1 episode)

Hank Scott

Kenneth Bradley

Dr. Bruce Merritt

Jeff (1 episode)

Duke Bradley

Major Gregory Keen

Rev. Fulton

Steve Ward

(1 episode)

Rick

Frank Daniel

'Dakota' Jack Gaines

Dr. Chet Walker

Mark Russell

Stanley Blair

Frank Brooks

Stacey Wyatt

(1 episode)

Dr. Mark Williams

Jerry Russell

Dave Markson

Chief Investigator Paul Reagan

Mike Lassiter

Lee Kemper

Col. Patterson (1 episode)

(58 episodes)

Malcolm Bradley

Lt. Phillips

Don Adams

Dr. John Waldron

Tom Davison

Larry Wilson

Buzz Doyle

Jim 'Brooklyn' Gannon

Hugh Harkness

Bill Wyatt

John Fairbanks

Peter Wiggins

Blaney Lewis

Capt Allen Danton

Rex

Bill Dixon

Hal McByrne

Jeff Stewart

Taylor Henry

Jackra the Magnificent

Lt. Rhody Graves

Jack Stoddard

Joe

Constable Thornton

Bill Crane

Briggs

Charlie Webster

Dennis Crane

Bruce Eaton

Dan Barton

Call Boy (uncredited)

Lt. Larned

Dick Randolph

Hunk Jordan

Murph

Frank Oliver

Fred

Mr. Weems

(uncredited)

Reporter (uncredited)

Johnny Jordan

Jeff, Protective Association Henchman

Powder, Henchman

Police Garage Mechanic

Elevator Passenger

Silk Patterson

Harry Vay

Buck Hogan

Sailor (uncredited)

Salesman (uncredited)

Pilot

Captain Reid

Minor Role

Midshipman Jepson