Kananu Kirimi has played two different characters over the course of the series:
- Episode 6.4 Deus Ex Machina: Part 2 (2007) - Salma Ahmed
- Episode 6.3 Deus Ex Machina: Part 1 (2007) - Salma Ahmed
- Episode 4.2 In Sight of the Lord: Part 2 (2004) - Sophie Davis
- Episode 4.1 In Sight of the Lord: Part 1 (2004) - Sophie Davis
Clive Wood has played two different characters over the course of the series:
- Episode 9.8 Conviction: Part 2 (2011) - Carney
- Episode 9.7 Conviction: Part 1 (2011) - Carney
- Episode 4.2 In Sight of the Lord: Part 2 (2004) - Neil Clayton
- Episode 4.1 In Sight of the Lord: Part 1 (2004) - Neil Clayton