ooh... Selar and K'Ehleyr were played by the same woman? Wow!
More than that. We had Season Two head writer, Tracy Tormé, at a New Zealand convention after his TNG stint. He had postulated a several-episode arc for Worf to follow "The Schizoid Man", with numerous references to Worf turning up at sickbay with unusual cuts and bruises, and obviously having an off-screen relationship with an Enterprise crewmember, finally revealing a few episodes later that it was with the Vulcan, Dr Selar.
The producers said no to that idea, but loved the concept of exploiting the height and probable chemistry between Suzie Plakson and Michael Dorn, so when K'Ehleyr the half-Klingon was created, they invited Suzie Plakson back to play her.