Star Trek: The Next Generation – Rightful Heir [6.23]

Undergoing a crisis of faith, Worf spends time at a Klingon holy shrine and is shocked when Kahless, the legendary founder of the Klingon people, suddenly returns in front of him, in apparent fulfillment of prophesy. 

Star Trek: The Next Generation – Reunion [4.7]

The dying Klingon Chancellor K’mpec requests that Picard serve as the arbiter between the leading contenders to replace him as leader of the Empire.  At the same time, K’Ehleyr returns to the Enterprise with her child, Alexander

Star Trek: The Next Generation – Manhunt [2.19]

The Enterprise transports delegates to an important conference, including Lwaxana Troi.  Unfortunately, Ambassador Troi is undergoing a Betazed “menopause” that greatly increases her sex drive, making her determined to find a new mate.  She pursues Picard, who retreats by hiding on the holodeck in a Dixon Hill program.