Mist of the Marsh is the name of the invisibility potion mixed by the Ancient.
This episode marks the return of Cheryl as Caine's ward after the events of ' Redemption (2) '. It is implied that Caine had a hand in her early release from prison.
Goof: The bad guy holds the gun up preparing to shoot Peter when Blaisdell grabs the guys arm and twists it down to get the gun. However after that the bad guy then reacts as if someone had hit him and we hear the sound effect of someone hitting him. The bad guy falls to the ground and Blaisdell looks down and he now has the gun. The only contact Blaisdell had with him was trying to get the gun.
Chan invites Caine to participate in the tournament to repay a debt he feels is owed as a result of the events in ' Challenge '.
Judy Powell, who is introduced in this episode as Peter's new partner, mentions at one point that her sister was Kira Blackmore, seen in the episode 'Shadow Assassin'. With this recollection, there is a brief flashback to the events of that episode.
It is revealed that Caine carries a bullet inside him from an altercation in the past.
There is a brief flashback of scenes from the season 1 episode 'Challenge' when Caine is aboard the boat.
' Six Months Later ' flashes on the screen at the beginning of the episode after a replay of the final moments of ' Retribution (2) '.