When McGee is putting on his lanyard he says "Up, Up, Down, Down, Left, Right, Left, Right, B, A, Select, Start" and the woman he his talking to replies "Unlimited Lives Granted." The button combination he mentions is a very well-known cheat code called The Konami Code, allowing the player of most Konami games in the 1980s to have augmented abilities and/or unlimited/multiple extra lives.
The complete phrase with respect to the episode title is "Judge, Jury and Executioner", however, the phrase is completed in the, presumably, concluding part.