Hmmm... I looked up the Brass Ring episode, and you are right that Angie Dickinson is in it, but when I watched the you tube intro, She has brown hair. And no mistaking it's Angie Dickinson.
But I swear that picture is of Susan Oliver. A platinum blonde who appeared in 2 episodes of The Fugitive.
I could be wrong.
Upon further review, Duvall and Oliver appeared in the first season 2 part episode "Never Wave Goodbye" (1963).
I bet that picture is from that episode.