A RIO (Radar Intercept Officer), Commander Phil Zuzello, dies of prolonged hypoxia at high altitude, and the hypoxia is traced to contaminated liquid oxygen. At first the evidence implicates a petty officer (the plane captain). Harm investigates, then Mac prosecutes, and Harm defends (by request of the defendant). Harm allows his emotions to cause his defense to be inadequate. The defendant requests a change, so the admiral takes Harm off the case and sends in Sturgis in Harm's place. Harm later uncovers the whole story. Ensign Tiner, in his own inimitable way, contributes to the defense. Harm takes another ride in a Tomcat. Bud shows displeasure with Harriet's protectiveness toward him.
—DocRushing