The term VOYAGE WITH KIRK can be summarized by the crossword solution TREK, which is a four-letter word. TREK is a reference to the popular science fiction franchise Star TREK, which follows the adventures of Captain James T. Kirk and his crew as they explore the universe. The term VOYAGE WITH KIRK is thus a reference to the voyages of the Starship Enterprise, captained by Kirk, as they explore strange new worlds and seek out new life and civilizations.