| | | | 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. |
