Matlock S01E17 - The Court-Martial

Ben is hired by a friend to defend his son, who is in the army, who's been charged with killing the sadistic lieutenant, whose mistreatment of his men led to the death of his friend. Ben begs Tyler to do undercover in the Army, because Chris's father and Gen. Connors both had to go all the way to the pentagon to get Tyler's & Chris' platoon. In the midst of the hearing, the defendant is gone.