In 1815, Michael Martin, member of an Irish revolutionary society, turns highwayman to support it, and soon becomes an outlaw. In Dublin, he meets famous rebel "Captain Thunderbolt" and becomes his second-in-command, under the name "Lightfoot."
| Actor | Role |
|---|---|
 Rock HudsonMichael Martin | Michael Martin |
 Barbara RushAga Doherty | Aga Doherty |
 Jeff MorrowJohn Doherty | John Doherty |
 Kathleen RyanLady Anne More | Lady Anne More |
 Finlay CurrieCallahan | Callahan |
 Denis O'DeaRegis Donnell | Regis Donnell |
 Geoffrey TooneCaptain Hood | Captain Hood |
 Hilton EdwardsLord Glen | Lord Glen |
 Sheila BrennanWaitress | Waitress |
 Charles B. FitzsimonsDan Shanley | Dan Shanley |
 Christopher CassonLord Clonmell | Lord Clonmell |
| PPhilip O'FlynnTrim | Trim |
 Shay GormanTim Keenan | Tim Keenan |
 Kenneth MacDonaldDesmond | Desmond |
 Robert BernalClagett | Clagett |
| LLouise StudleyCathy | Cathy |
 J.G. DevlinTuer O'Brien | Tuer O'Brien |
 Mike NolanWillie the Goat | Willie the Goat |
| EEdward AylwardBig Tom | Big Tom |
| LLord Mount CharlesEnglish Gentleman | English Gentleman |
| LLady Mount CharlesEnglish Lady | English Lady |
 Harold GoldblattBrady | Brady |