Star Trek

End of "Kir'Shara."  I don't recall this ever finding an end or what happened with those two.  

Also, end of "Two Days and Two Nights" - just who was Keyla?  

Do you think the writers hoped to resolve these issues if the show hadn't been cancelled?

Not necessarily. As much as they seem to enjoy multiple episode story arcs and having characters make returns, sometimes they just intend for it to be a one episode event with no correct resolution. I always kind of wondered about the woman from Two Days And Nights, but it seemed as if she did all they intended for her to do and moved on. I don't have Season 4, so I don't remember Kir'Shara.

I imagine Talok the Romulan would have shown up again during Season 5. As for the random woman in "Two Days and Two Nights", I don't think so.