Rob Dixon has played two different characters over the course of the series:
- Episode 16.2 Change: Part 2 (2013) - Phillip Briggs
- Episode 16.1 Change: Part 1 (2013) - Phillip Briggs
- Episode 1.4 Long Days, Short Nights: Part 2 (1996) - Charlie
Anna Madeley has played two different characters over the course of the series:
- Episode 21.2 Moment of Surrender: Part 2 (2018) - Anna Lawson
- Episode 21.1 Moment of Surrender: Part 1 (2018) - Anna Lawson
- Episode 16.2 Change: Part 2 (2013) - Annette Kelly
- Episode 16.1 Change: Part 1 (2013) - Annette Kelly