| Roger Allam | DCI Fred Thursday |
| Shaun Evans | DS Endeavour Morse |
| Sean Rigby | DS Jim Strange |
| Julian Moore-Cook | Jack Swift |
| Gabriel Tierney | John Paul Martinelli |
| Caroline O'Neill | Win Thursday |
| Mia McCallum | Maggie Widdowson |
| Angus Yellowlees | John Sarson |
| Andrew Havill | Professor Lucius Stamfield |
| Harriet Thorpe | Miss Newell |
| James Bradshaw | Dr. Max DeBryn |
| Abigail Thaw | Dorothea Frazil |
| Anton Lesser | Chief Superintendent Reginald Bright |
| John Hollingworth | Dan Lofthouse |
| Joseph Millson | Robert Fenner |
| Eleanor Fanyinka | Cecily Fenner |
| Elliot Levey | Ray Jubba |
| Sara Vickers | Joan Thursday |
| Roxanne Palmer | Frida O'Rourke |
| Lewis Macleod | Eamonn Andrews |
| Ruth Bradley | Sarah Sellars |
| Jacinta Mulcahy | Mrs. Swift |
| Killian Coyle | George Sellars |
| Colum Convey | Marmaduke 'Duke' Ward |
| Evelina Järrebring | Brigitte Eriksson |
| Christopher Brand | DS Bill Shaw |
| Tom Spink | Noel Baxter |
| Gianni Calchetti | John the post worker |
| Ty Hurley | Crime Investigation Department |
| Nicki Vickery | Skinhead |