A desperate rescue beneath the waves. The Deadly Sea is an oceanic quest for 4-8 characters of 4th-7th level in the AD&D® game. The use of magical items or spells which aid undersea combat, movement, and breathing is strongly advised. The ability to open locks is also helpful, as are mariner skills and knowledge. See additional notes in the section ‘‘For the Dungeon Master.” The adventure begins at a seaport which the Dungeon Master should name and develop as desired, to fit the circumstances of his campaign. The names of other areas may be changed to fit the campaign as well. This module requires some detailing and planning prior to use.