Did I forget anyone here?
Cathy Wallis (Time and Memories) - old GF, but she is a suspect
Cathi Ryan (Man in a Steel Frame) - I think they "did it," but the flashbacks are dopey
Margo Cooper (Thanks for the Honeymoon) - an old flame, they are hesitant, can't make up their minds about whether to resume relationship
Marni Howard (Gun for McGarrett) - he takes her out somewhere, I dunno how close they get
Chelsea Merriman (Sing a Song of Suspense) - she stays at his house, eats yogurt with him
Rosemary Quong (Cocoon) - they probably did it, there is a large age difference
Nicole Wylie (Singapore File) - they share a crappy room on a steamship, hmmm...