The Eleventh Day, Monday, 13 December Summary

The Air Force Reserve assembles to face the Soviet Navy, if only as a scare tactic. On the Soviet ship, the Kirov, the officers decide to stop all aggressive maneuvers to avoid a conflict with the Americans and continue on their mission to find the missing submarine. On the USS Dallas, Jones has spent the last two days tracking the mystery submarine. He locates the signal of the ship coming towards them.

Still on the HMS Invincible, Jack Ryan has leisure time to read a psychological report of defectors. At the Naval Hospital, Dr. Tait and Dr. Jameson have ruled out radiation exposure and see some improvement in their mystery patient. The KGB officer assigned to watch the patient almost lights a cigarette near the oxygen tanks and the doctors worry that the Soviets do not want the patient...