Donna Mills in all her “Knots Landing" glory. (CBS Photography/AP)

• Donna Mills
lunching at Hudson in Dupont Circle on Monday — we know, blast from the past, right? Wrap dress, black knee-high boots, double-breasted trench coat. The “Knots Landing” star was in town taking her daughter Chloe college visiting. The actress had the tuna niçoise; her daughter had the reuben.