Main Characters Major John D. "Mac" MacGillis 96 main appearances Polly Cooper-MacGillis 96 main appearances Elizabeth Cooper-MacGillis 96 main appearances Robin Cooper-MacGillis 96 main appearances Casey Cooper-MacGillis 96 main appearances 2nd Lt. Gene Holowachuk Sgt. Byron James Merilee Gunderson Marcus C. Craig Gunnery Sergeant Alva "Gunny" Bricker