Star Trek: The Next Generation – All Good Things [7.25]

Picard finds himself mysteriously moving back and forth between three different eras of his life:  the day when he first came aboard the Enterprise as Captain, far future when he is long-retired, and the “present day.”  In all three time frames he becomes aware of a mysterious anomaly in space that threatens to destroy the universe.  He is also told by Q that he must solve this mystery in order to prove that humanity is worthy to exist. 

Star Trek: The Next Generation – Masks [7.17]

The Enterprise encounters some sort of strange phenomenon that causes various parts of the ship to be slowly transformed into a copy of a long dead ancient civilization, while Data becomes possessed with multiple dead personalities from this civilization. 

Star Trek: The Next Generation – Thine Own Self [7.16]

Suffering from amnesia after being Injured in an accident, Data wanders into a pre-warp village and inadvertently exposes the local population to radioactive rocks.  He races to find the cause of the people’s sickness before lives are lost, but at the same time comes under suspicion for causing the problems himself. 

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 – Birthright, Part I [6.16]

Worf hears a rumor that his father, long-thought dead, is actually alive in a Romulan prison camp.  He finds his way there, but instead discovers that his father is dead and that the Klingons seem to be willing prisoners who turn Worf in to their captors.  Meanwhile, an accident leads Data to start dreaming.

Star Trek: The Next Generation – Man of the People [6.3]

Negotiator Ves Alkar comes on board the Enterprise for some delicate peace talks, and forms a connection with Counselor Troi, over the enraged objections from his aged mother.  After his mother dies, Troi participates in a special remembrance ceremony with Alkar, during which he secretly “bonds” with her, causing her to become the recipient of his negative emotions. 

Star Trek: The Next Generation – Cost of Living [5.20]

A newly engaged Lwaxana  Troi comes on board the Enterprise to prepare for her wedding to man she’s never met, something she’s agreed to as she’s feeling old.  Meanwhile, Alexander and Worf run into a lot of tension in their relationship.  Lwaxana bonds with Alexander, to Worf’s concern.  Meanwhile, a strange swarm of space-born organisms innocently threatens the ship. 

Star Trek: The Next Generation – The Masterpiece Society [5.13]

The Enterprise discovers a reclusive genetically engineered colony who are in imminent danger from a passing stellar core fragment. 

Star Trek: The Next Generation – Darmok [5.2]

When he and Picard are unable to communicate, the Captain of a Tamarian vessel arranged for the two of them to be stranded on a planet with an invisible and aggressive monster.  Picard eventually realizes that the Tamarian communicate purely by metaphor

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.