| It’s Dark Outside follows the sharp-witted and memorably prickly detective as he tackles a fresh batch of cases. Assisting Rose in Series One is the more amenable DS Swift (played by a youthful Keith Barron), with John Carson as solicitor Anthony Brand and June Tobin as Brand’s journalist wife, Alice; Series Two sees Rose verbally sparring with newcomer DS Hunter, played by cult favourite actor Anthony Ainley. | 
| Name | Character | Episodes | 
|---|---|---|
| John Carson | 16 | |
| Keith Barron | 16 | |
| William Mervyn | 16 | |
| Anthony Ainley | 16 | |
| Noel Hood | Mrs Lamp | 1 | 
| Wilfred Downing | Taffy | 1 |