| Name | Character | Episodes |
|---|---|---|
| David Cross | Todd Margaret | 7 |
| Martin Freeman | Greg Wilson | 1 |
| Lucy Punch | Alice | 1 |
| Siobhan Finneran | Shirley | 1 |
| Ben Miller | Felix | 1 |
| Anthony Stewart Head | Stephen | 1 |
| Rory Kinnear | Rob Black | 1 |
| Phil Davis | Sergeant | 1 |
| Reece Shearsmith | Freddy | 1 |
| Kathy Burke | The Virgin Mary | 1 |
| Ruth Bradley | Laura | 1 |
| Miranda Raison | Linsey | 1 |
| Alexander Armstrong | Murdo | 1 |
| Corey Johnson | Rex Masters | 1 |
| Mark Huberman | Rory McWilliams | 1 |
| Darren Boyd | Horatio | 1 |
| Sharon Horgan | Helen | 1 |
| Stephen Mangan | Alex | 1 |
| Cara Horgan | Emily | 1 |
| Katy Wix | Fanny | 1 |
| Ned Dennehy | Bob Salmon | 1 |
| Ingrid Oliver | Rebecca Black | 1 |
| Jim Howick | Various | 1 |
| Kevin Bishop | Various | 1 |
| John Fortune | Magistrate | 1 |
| Adam Buxton | Jack | 1 |
| Rosie Cavaliero | Louisa | 1 |
| Georgia King | Winnie | 1 |