Schuylkill County, Pennsylvania, 1876. A secret society of Irish coal miners, bond by a sacred oath, put pressure on the greedy and ruthless company they work for by sabotaging mining facilities in the hope of improving their working conditions and the lives of their families.
| Actor | Role |
|---|---|
 Sean ConneryJack Kehoe | Jack Kehoe |
 Richard HarrisJames McKenna | James McKenna |
 Samantha EggarMary Raines | Mary Raines |
 Frank FinlayDavies | Davies |
 Anthony ZerbeDougherty | Dougherty |
 Bethel LeslieMrs. Kehoe | Mrs. Kehoe |
 Art LundFrazier | Frazier |
 Anthony CostelloFrank McAndrew | Frank McAndrew |
 Philip BourneufFather O'Connor | Father O'Connor |
 Brendan DillonMr. Raines | Mr. Raines |
| FFrances HeflinMrs. Frazier | Mrs. Frazier |
 John AldersonJenkins | Jenkins |
 Malachy McCourtBartender | Bartender |
| SSusan GoodmanMrs. McAndrew | Mrs. McAndrew |
| TTom JonesFootball Player (uncredited) | Football Player (uncredited) |
| KKaren MachonGirl at Football Game (uncredited) | Girl at Football Game (uncredited) |
 John OrchardMan in Court Room (uncredited) | Man in Court Room (uncredited) |
 George PetrieProsecutor (uncredited) | Prosecutor (uncredited) |