| Name | Character | Episodes |
|---|---|---|
| Ellie Haddington | Carol Porter | 14 |
| Brian Murphy | Jack Dobson | 14 |
| Ralf Little | Richard Dickens | 14 |
| Phoebe Waller-Bridge | Chloe Astill | 14 |
| David Troughton | Stan Astill | 14 |
| Marcia Warren | Alice Dobson | 14 |
| Seeta Indrani | Brenda Kiely | 14 |
| Michelle Terry | Sarah Porter | 14 |
| Robert Glenister | Phil Porter | 8 |
| Kobna Holdbrook-Smith | Jason | 8 |
| Daniel Ings | John Streatfield | 6 |
| Jack Roth | Big Issue Frank | 6 |