- Don Terry
- Cmdr. Don Winslow
- Walter Sande
- Lt. 'Red' Pennington
- Elyse Knox
- Mercedes Colby
- Philip Ahn
- Hirota
- June Duprez
- Tasmia
- Edgar Dearing
- CPO Ben Cobb
- Lionel Royce
- Reichter
- Henry Victor
- Heilrich
- Charles Wagenheim
- Mussanti
- Nestor Paiva
- The Scorpion
- Alex Havier
- Japanese pilot
- Stanley Blystone
- Detective Collins [Chs. 7, 11]
- Paul Bryar
- Water Gate Controller
- Jack Cheatham
- Truck Driver [Chs. 8-9]
- Richard Cramer
- Captain Holding [Ch. 1]
- Eddie Dean
- Clark, Winslow's Aide [Chs. 2-3, 9, 12-13]
- James Donlan
- Police Dispatcher [Ch. 9]
- Paul Dubov
- Coast Guardsman [Ch. 3]
- Heenan Elliott
- Air Raid Warden [Ch. 8]
- Al Ferguson
- Farmer [Ch. 11]
- Jack Gardner
- Coast Guardsman with Message [Ch. 2]
- Fred Graham
- Henchman
- Frank Hagney
- Henchman Muller [Ch. 13]
- Eddie Hall
- Coast Guard Pilot
- Chuck Hamilton
- Guard in Hospital Hallway [Ch. 8]
- Eddie Lee
- Japanese Warehouseman [Ch. 4]
- George Magrill
- Henchman Slauder [Ch. 13]
- Frank O'Connor
- Farmer [Ch. 11]
- Jack Perrin
- State Guard
- Harry Strang
- Captain Jensen [Chs. 1-2, 13]
- Dale Van Sickel
- Sailor at Crow's Nest Cafe [Ch. 7]
- Louis Vincenot
- Maru [Ch. 10]
