“Justice,” 7 p.m., Fox. As the Fox network tried to salvage its crumbling lineup, it had to decide what to keep. At first, “Vanished” was going to get this Friday spot. Then Fox switched: The final “Vanished” hours will air only on myspace.com/vanished. Instead, this goes to “Justice,” from “CSI” producer Jerry Bruckheimer. The show follows a big-money law firm then shows if the defendant is really guilty. The clients are usually rich, but this week’s episode is a detour: Tom (Kerr Smith) persuades people to defend the firm’s security guard, who faces overwhelming evidence that he killed his wife.