Season Four Episode Guide

The Best of Both Worlds, Part 2

Episode #: 401
Air Date: 09.24.90
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Captain Riker and the Enterprise crew attempt a daring plan to rescue Captain Picard, who has been turned into a mouthpiece by the Borg -- who continue their relentless and destructive march toward Earth.


Episode #: 402
Air Date: 10.01.90
Our Rating:

Picard returns to his family home in France, and receives a less-than-friendly welcome from his estranged brother. Worf deals with the surprise visit of his adopted parents.


Episode #: 403
Air Date: 10.08.90
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A homing beacon draws Data to a remote world, where he discovers that his creator, Dr. Noonian Soong, is still alive. But the signal also calls the android's evil brother, Lore.

Suddenly Human

Episode #: 404
Air Date: 10.15.90
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Picard must decide whether to bring a young man home to Earth, or return him to the hostile alien race that raised him from childhood.

Remember Me

Episode #: 405
Air Date: 10.22.90
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Dr. Crusher realizes that her friends, family and coworkers are slowly disappearing, leaving no trace of their ever having existed.


Episode #: 406
Air Date: 10.29.90
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The sister of the late Tasha Yar helps the crew of the Enterprise in an attempt to locate and rescue the crew of a downed Federation freighter on her homeworld.


Episode #: 407
Air Date: 11.05.90
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Worf's Klingon lover returns to the Enterprise with a surprise -- Worf's son. Picard is selected to arbitrate a dispute between two warriors vying for leadership of the Klingon High Council.

Future Imperfect

Episode #: 408
Air Date: 11.12.90
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Riker awakens to a future he does not remember, in which he is captain of the Enterprise and the Federation is at peace with the Romulans. But all is not as it seems.

Final Mission

Episode #: 409
Air Date: 11.19.90
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Wesley joins Captain Picard on one last mission before leaving for Starfleet Academy -- a mission that leaves them stranded on a desert moon without water.

The Loss

Episode #: 410
Air Date: 12.31.90
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Deanna Troi struggles with the sudden and inexplicable loss of her empathic abilities, as the Enterprise is pulled toward destruction by an unseen anomaly.

Data's Day

Episode #: 411
Air Date: 01.07.91
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Commander Data prepares for the wedding of Keiko and Chief O'Brien, as the Enterprise ferries a Vulcan ambassador to a secret meeting with the Romulans.

The Wounded

Episode #: 412
Air Date: 01.28.91
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To maintain a fragile new alliance with the Cardassians Picard and his crew confront a Federation captain who has been attacking their ships.

Devil's Due

Episode #: 413
Air Date: 02.04.91
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The Enterprise finds a planet terrorized by an alien who claims to be the Devil, and Picard fights to expose her for the con artist she really is.


Episode #: 414
Air Date: 02.11.91
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The crew begins to suspect that Data is deceiving them after a wormhole briefly renders them unconscious.

First Contact

Episode #: 415
Air Date: 02.18.91
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The Enterprise prepares to make first contact with a developing civilization, but Riker is injured during a covert observation mission -- and stranded on the planet.

Galaxy's Child

Episode #: 416
Air Date: 03.11.91
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A giant space organism latches itself on to the Enterprise hull, and LaForge must seek the help of the cold and critical Dr. Leah Brahms to save the ship and the creature. But matters are complicated when Brahms discovers Geordi's holographic recreation of her.

Night Terrors

Episode #: 417
Air Date: 03.18.91
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A rift in space traps the Enterprise when the ship investigates a science vessel that is adrift, and the crew begin to suffer from intense hallucinations.

Identity Crisis

Episode #: 418
Air Date: 03.25.91
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LaForge teams with an old friend to locate missing officers they once served with, but the two begin to fall victim to a previously dormant parasite that threatens to transform them into another species.

The Nth Degree

Episode #: 419
Air Date: 04.01.91
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An alien probe makes Lieutenant Barclay the most intelligent human who has ever lived, but his transformation threatens to destroy the Enterprise.


Episode #: 420
Air Date: 04.22.91
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Q puts the Enterprise crew into the fabled story of Robin Hood, forcing Picard to fight to rescue an old flame.

The Drumhead

Episode #: 421
Air Date: 04.29.91
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An explosion on board the Enterprise causes a renowned Starfleet admiral to investigate the possibility of a saboteur on the ship, leading to an all-out witch hunt.

Half a Life

Episode #: 422
Air Date: 05.06.91
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While visiting the Enterprise, Lwaxana Troi falls in love with a brilliant alien scientist -- but learns that he will soon participate in the ritual suicide that his society requires of their elderly.

The Host

Episode #: 423
Air Date: 05.13.91
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Beverly falls in love with a Trill -- a symbiotic species that lives within a humanoid. But when Odan's host body is killed, Riker volunteers to serve as a temporary host -- complicating Crusher's relationship with him.

The Mind's Eye

Episode #: 424
Air Date: 05.20.91
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LaForge is kidnapped by the Romulans and turned into a programmed killer, intended to launch the Federation into war with the Klingons.

In Theory

Episode #: 425
Air Date: 06.03.91
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Data experiments with a romantic relationship when a fellow crew member begins to display feelings for him.

Redemption, Part 1

Episode #: 426
Air Date: 06.17.91
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Picard must act quickly to try and prevent a Klingon civil war when the Duras family challenges the installation of Gowron. Worf and Kurn move to reclaim their family honor.