
Man-woman team of investigators uncover a gang whose mad scientist leader has developed an invisibility chemical and plans to build a mercenary army of invisible men.
Lane Carson

Carol Richards

The Phantom Ruler

Burton

Harris

"Harry Long"

Warren Madison

Otto Wagner, aka "Frank Martin"

"James Hunter"

"Henry Miller"

Mr. Moore

Kirk - Body-Shop Henchman [Ch.11] (uncredited)

Roadblock Cop [Ch. 1, 7]

Garage Watchman [Ch. 3] / Armored Car Guard [Ch. 11]

Henchman Sam [Ch. 4-5]

Decoy & Dumptruck Henchman [Ch. 5, 7]

Henchman Bill 'Mack' Haines [Chapters 5, 10]
Barn Henchman Stoner [Ch.8]

Doctor [Ch. 12]

Second Roadblock Cop [Ch. 1 bit]
Bank Watchman [Ch.1 bit]
Crooked Watchman [Ch. 2 bit]
Chemical Truck Cop [Ch. 5 bit]

Watchman Joe [Ch. 5 bit]
Dynamite Henchman Dirk [Ch. 6 bit]

Cave Policeman [Ch. 7 bit]
Second Garage Watchman [Ch. 7 bit]

Squadcar Cop [Ch. 7 bit]

Second Armored Car Guard [Ch. 11 bit]