Barry Aird has played six different characters over the course of the series:
- Episode 24.69 An Honour to Serve: Part 2 (2008) - PS Tim Hooper
- Episode 24.68 An Honour to Serve: Part 1 (2008) - PS Tim Hooper (uncredited)
- Episode 19.31 Disillusion (2003) - Wayne Seddon
- Episode 17.42 Gun Crazy: Part 1 (2001) - Billy Pitt
- Episode 12.50 Going for a Song (1996) - Solicitor
- Episode 11.116 Bait (1995) - Intruder
- Episode 9.20 Persuasion (1993) - Kevin Mitchell