Jennifer Love Hewitt returns to after going on maternity leave to give birth to her third child, son Aidan James, with husband Brian Hallisay. On the show, viewers last saw Hewitt's Maddie in an October episode, where the 9-1-1 operator was seen leaving her and Chimney's baby at the firehouse. Ever since then, Maddie has been missing in action.On Monday's episode, titled «Boston,» Chimney (Kenneth Choi) is determined to find a missing Maddie among the chaos of St.