I'm afraid I had my Kathy(ie)'s mixed up. K. Browne was the Connie-clone in the Hitchcock, but Bennett was Junebug.I suspect that WB may have hoped to have a spare Connie Stevens in Kathie Bennett. She appeared in an episode of HE (Across the River Lethe) late in the third season as Cricket's cousin, Junebug Blake. The character had little to do with the plot, and the movie magazines of the time implied that Connie was in the midst of a contract dispute and was briefly suspended. I was a 14 year old TV addict at the time and believed what those magazines said - that fans must write WB in Connie's defense, so I did. It was almost a year before they brought Tina Cole in to cover Connie's next absence.
FWIW, Kathie was in one of the Hitchcock hour-longs (Bed of Roses), playing a ditzy young bride who resembled Wendy, )but with a Hitchcockian dark side).