Continuity mistake: When Max is phoning the Chief to let him know the mission's been accomplished, he takes the oars out of the oarlocks before opening his shoephone. The oars change from being out of the oarlocks in the closeups to still being in the water in the long shots for the rest of the episode.
Continuity mistake: When Max is walking around the school grounds he walks up to man breaking a piece of wood. The man breaks a piece of wood and then bends down to pick up a new piece, leaving one on the ground. The shot changes and Max is standing there talking and the man breaks the piece of wood and bends down to pick up another one (which should be the last piece). However there is another piece left on the ground.
Continuity mistake: When Max is attacking the boat there is a shot from inside the cabin. Watch the door. Before Max shoots, there are a series of holes in the shade covering the door (they look like bullet holes). Max begins firing and there is another shot from inside and bullet holes begin appearing in the walls. The holes in the shade however, are gone.
Continuity mistake: Max and 99 are sitting on the sofa. There is a knock at the door and Max fires 3 bullets into the door from a gun. Later, the same day the door is shown behind Max and 99 and there no gunshot holes in the door. Also, 99 changed her clothes and Max still has on the same clothes.
Continuity mistake: Episode 16, season 4, "The Day They Raided the Knights." In Max's apartment, Max sneaks up behind 99 to give her a kiss. She punches him in the jaw and he falls back against the wall to the right of the doorknob. The scene changes to a close up of Max and he is sitting on the floor to the left of the doorknob.
Continuity mistake: When Max brings the coffee to the doctor's office, his suit is dark blue. After the opening credits he has no time to change, so how come his suit becomes dark gray?
Continuity mistake: In episode 17 of season 4, "Tequila Mockingbird," Max is going to pour tequila in Valdez's glass. The camera closes up to show Max picking up a bottle with a candle on it. The candle falls into the glass. When the camera angle changes to show Valdez and Max, the candle is gone.