During a maneuver, transposed digits lead to a fatal bombing of a unit's own men. This causes several seriously wounded and eventually one dead soldier. Lt. Rabb and Lt. Austin are assigned to investigate this case because the responsible man is none other than Jay Williams, the son of Gen. Williams. But it seems the case is clear since Jay confesses that this mistake was his fault. Locations: MCB Twenty-Nine Palms

An evacuation training for a Space Shuttle team ends with a dead pilot caused by a broken cable. Harm and Meg investigate and soon determine that the cable was sabotaged. Harm's first suspect is promoted pilot Lt.Cdr. Lowry. As this is an important mission (repairing a spy satellite monitoring Southwest Asia) it can't be canceled. And since there isn't another eligible pilot, Lowry cannot be removed from the team. A training flight with Lowry and Harm on board has a fatal system malfunction - again sabotage. Lowrey can now be crossed out but the person responsible for these incidents must be found as the scheduled mission must proceed as planned. It is highly possible that there will be another 'unpleasant surprise' to stop this mission. Locations: AFB Vandenberg; Space

Harm is assigned to escort a rambunctious and ravishing Romanian princess, whose life has been threatened if her father petitions to join NATO. Meanwhile, Bud wrestles with starting a romance with Ens. Harriet Sims.

International tensions mount as Harm, Mac and Bud board an aircraft carrier in the Sea of Japan to investigate the accidental shooting down of a North Korean civilian airline by Navy jets.

While negligence on the part of the Navy fliers is indicated, Harm and Mac uncover evidence of a spy aboard the carrier. Meanwhile, the threat of war becomes real when a U.S. salvage vessel is sent to the site to help with the investigation and two North Korean warships threaten to sink it if both U.S. ships don't leave the area immediately.