| | | Part 1 |
| Libby | Seeton | A suspected witch who drowned in the pool in 1679. |
| Julia | Abbott | Danielle Abbott's sister / Lena Abbott's aunt. aka: Jules. |
| Danielle | Abbott | Julia Abbott's sister / Deceased. aka: Nel. |
| Josh | Whittaker | Alec and Louise Whittaker's son. |
| Katie | Whittaker | Alec and Louise Whittaker's daughter. |
| Alec | Whittaker | Josh Whittaker's father. |
| Edward | Viaduct | The Prince. |
| Nickie | Sage | A tarot card reader. |
| Sean | Townsend | A Detective Inspector / Patrick Townsend's son. |
| Susie | Morgan | An actress. |
| Lena | Abbott | Danielle Abbot's daughter. |
| Erin | Morgan | Detective Sergeant on Danielle's death incident
. |
| Mark | Henderson | Lena Abbott's teacher. |
| Callie | Buchan | A Detective who interrogates Mark Henderson. |
| Mrs. Louise | Whittaker | Josh Whittaker's mother. |
| Hugo | | Josh Whittaker's friend. |
| Sarah Jane | Abbott | Danielle and Julia Abbott's mother. |
| Tanya | | Lena Abbott's classmate. |
| Ellie | | Lena Abbott's classmate. |
| Robbie | Cannon | A boy that Danielle Abbott's in love with. |
| Marilyn | Monroe | A famous actress. |
| Robert | Ward | A man who died in the drowning pool. |
| Jenny | | A local girl from Edinburgh. |
| Patrick | Townsend | Detective Inspector Sean Townsend's father. |
| Helen | Townsend | Sean Townsend's wife / Patrick Townsend's daughter-in-law. |
| Jean | Sage | Nickie Sage's sister. aka: Jeannie. |
| Lauren S. | Townsend | Patrick Townsend's wife.
Girl found dead at pool in 1983. |
| | | Part 2 |
| Liam | Markham | A boy who sells ecstacy. |
| Hairy | | Science guy who found receipt of Danielle Abbott's diet pill. |
| Mr. | Friar | A biology teacher. |
| Mr. | Mackintosh | A Swimming Coach. |
| Ms. | Mitchell | A P.E. teacher. |
| | | Part 3 |
| Tracey | McBride | Mark Henderson's fiancee. |
| | | Part 4 |
| Frankland | | Erin Morgan's colleague. |