Sean Cullen has played three different characters over the course of the series:
- Episode 11.22 Ace (2010) - Brett Trask
- Episode 11.16 Witness (2010) - Brett Trask
- Episode 10.17 Hell (2009) - Brett Trask
- Episode 5.24 Poison (2004) - Pete Campbell
- Episode 1.15 Entitled (2000) - Arthur Pruitt