Star Trek: The Next Generation – Identity Crisis [4.18]

The members of an away team that Geordi was on five years ago begin to behave uncharacteristically, abruptly leaving their lives to return to the planet they had been on together.  Geordi and the mission commander, Susanna Leijten, investigate this together even as they begin to fall under similar effects. 

Star Trek: The Next Generation – Ménage à Troi [3.24]

After spurning his advances, Lwaxana Troi is kidnapped by Ferengi DaiMon Tog, along with Riker and Deanna.  Tog is both smitten with her as well as interested in making use of her telepathic abilities to gain profit. 

Star Trek: The Next Generation – Sarek [3.23]

The Enterprise plays host to important negotiations that can only be held by legendary Federation ambassador Sarek.  However, the aged Sarek is suffering from a rare debilitating disease that causes his emotional control to break down.