In a cell in a London police station, a suspected I.R.A. bomber, Roche, has been detained for questioning. To help them in the interrogation, the London coppers have summoned Nelson, a detective from Northern Ireland's predominantly Protestant police force, the Royal Ulster Constabulary.
| Actor | Role |
|---|---|
 Brian CoxDetective Inspector Nelson | Detective Inspector Nelson |
 Philip JacksonDetective Superintendent Derek Harris | Detective Superintendent Derek Harris |
 Gary OldmanPolice Constable Eric Naylor | Police Constable Eric Naylor |
 Colum ConveyRoche | Roche |
| MMike BradwellFat Policeman | Fat Policeman |
 Mossie SmithWPC | WPC |
 Jerome FlynnIRA Man | IRA Man |
| JJohn KeeganIRA Man | IRA Man |
 Pauline MelvilleIRA Woman | IRA Woman |
| JJonathan PhillipsIRA Man | IRA Man |