| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Ed Guiney | Crew | Production | Executive Producer | 8 |
 Saul Dibb | Crew | Directing | Director | 2 |
 John Hayes | Crew | Directing | Director | 4 |
Sarah Phelps | Crew | Writing | Writer, Creator | 7 |
Rebecca Gatward | Crew | Directing | Director | 2 |
Chandni Lakhani | Crew | Writing | Writer | 1 |
Emer O'Shea | Crew | Production | Production Executive | 8 |
 Conleth Hill | Cast | Actor | Superintendent O'Kelly | 8 |
 Peter McDonald | Cast | Actor | Jonathan Devlin | 8 |
 Killian Scott | Cast | Actor | Detective Robert 'Rob' Reilly | 8 |
 Sarah Greene | Cast | Actress | Detective Cassandra 'Cassie' Maddox | 8 |
 Tom Vaughan-Lawlor | Cast | Actor | Detective Frank Mackey | 8 |
 Moe Dunford | Cast | Actor | Detective Sam O'Neill | 8 |
 Sam Keeley | Cast | Actor | Daniel March | 8 |
 Leah McNamara | Cast | Actress | Rosalind Devlin | 8 |
 Ian Kenny | Cast | Actor | Garda Phelan | 8 |
 Kathy Monahan | Cast | Actress | Margaret Devlin | 8 |
 Barry O'Connor | Cast | Actor | Cathal Mills | 8 |
 Amy Macken | Cast | Katharine 'Katy' Devlin / Jessica Devlin | 8 | |
 Eugene O'Hare | Cast | Actor | Detective Quigley | 8 |
| Person | Type | Job | Role(s) | Episodes |
