Deanna is impregnated by an unknown alien life-form, and Dr. Katherine Pulaski joins the Enterprise as the ship's new Chief Medical Officer.

The Enterprise encounters a mysterious void in space, and when they move in closer to investigate further, it envelops them and they can't get out.

An attempt to provide Data with a challenging Sherlock Holmes holodeck program backfires when its Professor Moriarty character accidentally becomes self-aware.

The Enterprise rescues the captain of a broken-down freighter, only to become involved in a dispute between feuding worlds, each demanding custody of their guest. Data seeks help from Guinan in understanding humor.

The crew ferries a deaf mediator to Solais V to negotiate an end to a civil war.

A dying anti-social scientist unintentionally comes upon the perfect vessel in which to preserve his intellect and arrogant personality - Data.

Enhanced DNA developments trigger an epidemic of rapid aging. Caught among its victims - Dr. Pulaski.

Under an Officers Exchange Program, Riker serves aboard a Klingon ship, whose aging captain seeks an unwarranted bloody retaliation for suspected Enterprise treachery.

When Data resigns his commission rather than be dismantled for examination by an inadequately skilled scientist, a formal hearing is convened to determine whether Data is considered property without rights or is a sentient being.

Wesley falls for the young future leader of Daled IV, unaware just how dangerous the girl's protective and overly restrictive guardian can be.

Encountering the superior technology of a very ancient race creates system malfunctions for a doomed Federation starship, for the Enterprise, and for an eavesdropping Romulan warbird.

Worf, Data, and Riker find themselves trapped in a re-creation of a poorly written novel.

The Enterprise comes across its own shuttlecraft adrift in space - a duplicate - with an unconscious duplicate Capt. Picard inside.

Riker's delight at being offered a command of the USS Ares turns to frustration when the man sent to prepare him for his mission is his estranged father; Worf's behavior leads Wesley to delve into Klingon tradition.

Data befriends an alien girl in distress, breaking the Prime Directive, while Wesley commands his first team.

Q tries to prove that Picard needs him as part of their crew by hurling the Enterprise 7,000 light years away where they encounter the Borg for the first time.

An antiquated distress signal leads to two lost 22nd century Earth colonies, each facing doom in different ways, one by fire, the other by prolonged cloning.

A midlife Betazoid condition renders Ambassador Troi hot on the hunt for romance and wedlock with Captain Picard - or any man.

The Enterprise addresses the emergency of an old Klingon ship coming out of stasis and ready to fight the Federation. A half-Human/half-Klingon emissary, who once knew Worf intimately, arrives to help.

The crew of the Enterprise participates in war games.

When Commander Riker comes down with a dangerous alien infection after an away mission, the only way to treat it may be through reliving his memories.