Colonel Jack Stern: Colonel in the U.S. Air Force, of the Human race. Served for twenty-four Earth years as a helicopter pilot before becoming grounded due to a mild heart condition. He was later reinstated to co-pilot status and eventually pilot when his health improved. He was reassigned as the officer in charge of the Observables Classification Unit (OCU). Height 7.2 pol (1.95 meters), salt-and-pepper hair, steel gray eyes, medium build. After his wife and daughter were killed in a car accident by a drunk driver, he became reclusive and focused on his work in the OCU. When he met Frank and Danielle Jolan he found a new focus in his life helping them reunite with their daughter, Danica.
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