Witness for the Persecution - S3-E3
Plot hole: In this episode, the villain makes a phone call to KAOS headquarters when he's captured demanding that they kill Max to stop him testifying in court against him. Later, several say that Max is the only witness to the villain's crimes, but the Chief and 99 were in the room when the villain made the call, so they could have been witnesses to "conspiracy to commit murder."
Witness for the Persecution - S3-E3
Visible crew/equipment: When Doctor Baskum demonstrates the cube of safety, a moving boom mike pole is reflected in the glass of the cube.
Witness for the Persecution - S3-E3
Other mistake: In Max's apartment, the KAOS agents fire bullets everywhere, but nothing in the room sparks, explodes or does anything when hit by bullets.
Suggested correction: Assuming the submitter meant Max (since there is no Ma character in this episode), the agents aren't firing at anything in the room other than the Cube of Safety, which isn't made of a spark-able material nor would it "explode".
Witness for the Persecution - S3-E3
Continuity mistake: In this episode Max claims a fear of lightning. But in many other episodes, he's very close to lightning, and he's fine.
Witness for the Persecution - S3-E3
Visible crew/equipment: Set lights are reflected in Doctor Baskum's glasses when he and Max are talking in the kitchen.
Witness for the Persecution - S3-E3
Audio problem: When Max tries to get across the street, in one of the shots of the KAOS agent in the window, he fires a shot (evidenced by the muzzle flash) that's inaudible.