Craig Kennedy
Walter Jameson
Mrs. Paul Gironda
Shirley McMillan
Gordon Gaunt
Verna Gironda
Denton
Dr. Paul Gironda [Chs.1,4,8,13-15]
Louis Bouchard
Montgomery [Chs.1,2,5,6]
Joe Mitchell
Number Eight / Sailor Brawler
Lawyer Cromwell [Chs.1-3,6,7,15]
Maj. Courtney Wickham
Frank Hobart (as Charles Locher)
Nicky
Capt. Hansen [Chs.3, 11-14] (as Knute Ericksen)
First Mate Olaf [Chs.11-12,14] (uncredited)
Shirtless Sailor (uncredited)
Board Director [Chs. 1-2, 15] (uncredited)
Capt. O'Hara - Henchman Number Two (uncredited)
Officer Bill [Ch.1] (uncredited)
Bartender Steve [Chs.5,8,10-12,14] (uncredited)
Wilson - Henchman Number Four / Carlos Gaston [Ch. 9] (uncredited)
Attorney Arthur J. White (uncredited)
Riley - Sailor Guard [Chs. 11-12] (uncredited)
Blackie Humphries, alias Hamik [Chs.3,5,7,10,11] (uncredited)
Margaret, the Maid [Chs.1,5-7,10] (uncredited)
Warden [Ch.1] (uncredited)
Private Detective Sullivan (uncredited)
Police Officer Regan [Ch.1] (uncredited)
Jewett, Board Director [Chs. 1-2, 15] (uncredited)
Henchman Number Six - aka Spike Harvey (uncredited)
Nellie D Sailor [Chs. 1,11-14] (uncredited)
Bogus Taxi Driver (uncredited)
Henchman [Chs. 3-8] / Sailor Bar Brawler (uncredited)
Slug, Nellie D Sailor [Chs. 2, 11-14] (uncredited)
Marty, the Delivery Man [Chs.2,6-8] (uncredited)
Sailor (uncredited)
Jenkins, Craig's Butler (uncredited)
Denton's Maid [Ch.14] (uncredited)
Henchman (uncredited)
Policeman (uncredited)
Snub - Waiter [Chs.1,11-12] (uncredited)
Trustee [Ch.1] (uncredited)
Miss Dillon [Chs. 1, 6, 10, 14] (uncredited)
Strick - Lab Assistant (uncredited)
Nellie D Sailor [Chs. 2, 11-14] (uncredited)
Gallagher, alias Aji [Chs.3,5,10,11] (uncredited)