Ruth Gemmell played two different roles over the course of the series:
- Episode 8.8 End Game: Part 2 (2009) - Linda Cummings
- Episode 8.7 End Game: Part 1 (2009) - Linda Cummings
- Episode 7.4 Sins: Part 2 (2008) - Linda Cummings
- Episode 7.3 Sins: Part 1 (2008) - Linda Cummings
- Episode 2.6 Special Relationship: Part 2 (2002) - DI Jess Worrall
- Episode 2.5 Special Relationship: Part 1 (2002) - DI Jess Worrall