In Season 5, Sydney is expecting her first child. In the absence of Michael Vaughn, the child's father, Jack attends doctor's visits with Sydney and helps her to assemble a crib for his grandchild's nursery. However, he is distracted by the presence of Arvin Sloane within APO, a presence he (as the new director of the black ops unit) has authorized; Sloane's behavior appears dishonest, and although Sloane has admitted some of his lies, Jack remains on his guard.
