| Name | Character | Episodes |
|---|---|---|
| Ian Hart | Tony Conroy | 4 |
| Dougray Scott | Michael O'Connor | 4 |
| Sophie Okonedo | Connie Turner | 4 |
| Terence Maynard | Barrington | 4 |
| Stephen Rea | Augustine Flynn | 4 |
| Wunmi Mosaku | Stacey Cox | 4 |
| Flora Montgomery | Anna | 4 |
| John Kavanagh | John O'Connor | 4 |
| Reece Noi | Sean O'Connor | 4 |
| Simon Delaney | George | 4 |
| Darren Morfitt | Blanchflower | 4 |
| Vincent Davies | Xavier Foley | 1 |