| Name | Character | Episodes |
|---|---|---|
| Ellie Haddington | Fiona Drummond | 6 |
| Julie Graham | Alison McIntyre | 6 |
| Art Malik | Dr. Kamran Blake | 6 |
| Richard Wilson | John Doone | 6 |
| Stephen Moyer | Dr. Tom Scott | 6 |
| Aisling O'Sullivan | Dr. Katherine Doone | 6 |
| Gary Lewis | Greg Malloy | 1 |
| Barbara Horne | Siobhan Graham | 1 |