Lwaxana Troi appeared in 9 Star Trek episodes total: 6 on Star Trek: The Next Generation and 3 on Star Trek: Deep Space Nine.

Episode count

  • The Next Generation : 6 episodes.
  • Deep Space Nine : 3 episodes.

TNG episodes

  • “Haven”
  • “Manhunt”
  • “Ménage à Troi”
  • “Half a Life”
  • “Cost of Living”
  • “Dark Page”

DS9 episodes

  • 3 appearances total on Deep Space Nine.

So the short answer is: 9 episodes overall.