| McCallum is a British television series that was produced by STV Productions. Dr Iain McCallum was the original lead character, played by John Hannah. McCallum was a forensic pathologist who traveled by Triumph Motorcycle, and solved murders. The character had romantic involvements with two of the other principal characters, Joanna, and later Angela. The last episode did not include McCallum and Angela as the story stated that they had taken jobs in America. They were replaced by Dr. Dan Gallagher and Dr. Charley Fielding. |
| Name | Character | Episodes |
|---|---|---|
| Richard Moore | Sir Paddy Penfold | 16 |
| John Hannah | Dr. Iain McCallum | 15 |
| Zara Turner | Dr. Angela Moloney | 15 |
| Suzanna Hamilton | 14 | |
| Richard O'Callaghan | 14 | |
| Hugo Speer | 3 | |
| Richard O'Callaghan | Bobby Sykes | 2 |
| Sara Stephens | Faye | 1 |
| Suzanna Hamilton | Joanna Sparks | 1 |
| Eva Pope | Dr. Charley Fielding | 1 |
| Nathaniel Parker | Dr. Dan Gallagher | 1 |
| Daniel Betts | Ben | 1 |
| Cathryn Harrison | Claire Best | 1 |
| Jane Lapotaire | 1 | |
| Pete Lee-Wilson | Larry | 1 |
| Leon Lissek | 1 | |
| Arkie Whiteley | Catrin | 1 |
| Trevor Thomas | Mr. Sinclair | 1 |
| Rosie Cavaliero | 1 | |
| Simon Slater | Tom Victor | 1 |