Robert Stack

as Dan Farrell

as Eliot Ness

as John Sullivan

as Self - Co-Host / Self - Host

as Kyle Hadley

as Ted Drake

as The Gooch

as Stoat Muldoon

as Sumner Ethridge

as Self - Narrator

as Bob the Narrator / Bob / Bobby the Narrator

as Agent Flemming

as Friend / Self - Actor

Self

as Self - Host

as Eliot Ness

as Dr. Ellison

as Chandler Young

as Louis Faciano

as Mr. Gardner

as Jordan White

as Host / Narrator

as Winslow

as Ultra Magnus

as George Lancaster

as MacGregor

as Captain Frank Murphy

as Captain Rex Kramer

as Self - Guest

as François Davis

as Captain Linc Evers

as Capt. James Morgan

as Michael Rhodes

Archive

as David Frasier

as Mark McPherson

as Jim Beckley

as Cliff Wilder

as Narrator

as Dr. Donovan MacLeod

as Cliff Henderson

as Eliot Ness

as Eliot Ness

as John Paul Jones

as Eliot Ness

as William 'Bill' Beck

as Roger Shumann

as Owen Pentecost

as Dr. Tommy Baker

as Eddie Kenner

as Captain Charles Wogan

as Maj. Tom Burke

as Col. Gil Manton

as Lt. Billings

as Bob Hayward

as Johnny Regan

as Patrick O'Moore

as Jefferson Blake

Self

as Stephen I. Andrews