As Riker tries to save the Enterprise and the Earth from a powerful alien race, Captain Picard's life hangs in the balance. The crew faces their own demons and must overcome their own obstacles to continue their mission. This leads Data to return to his creator to better understand emotions. Worf must accept his Klingon heritage and face his former family. A power struggle threatens the Federation as the Romulans try to make peace with their universe and the Klingons deal with a potential successor to their empire. Political relations are strained within the Enterprise as a rogue ship attacks former enemies of the Federation, ultimately leading up to a civil war where one member of the Enterprise must decide where his loyalty lies.

Season 4 Episode 19 - The Nth Degree

Stardate: 44704.2. An alien probe transforms Barclay from a shy, awkward character into an arrogant super-genius who is able to interface with the Enterprise's computer through the holodeck. Air Date : 1st-Apr-1991

Season 4 Episode 1 - The Best of Both Worlds (2)

Stardate: 44001.4. Riker must pull out all the stops in order to save Earth from a Borg invasion being lead by none other than Locutus - otherwise known as Captain Jean-Luc Picard. Air Date : 24th-Sep-1990  Read More

Season 4 Episode 2 - Family

Stardate 44012.3. Picard meets with his older brother in France, and contemplates resigning his Starfleet commission after his ordeal with the Borg. Worf's adoptive parents spend time with their son on the Enterprise, and succeed in embarrassing him in front of his crewmates. Air Date : 1st-Oct-1990  Read More

Season 4 Episode 3 - Brothers

Stardate: 44085.7 While escorting a seriously ill boy to the closest Federation Starbase for treatment, Data mysteriously takes control of the Enterprise and takes it to a distant planet. He learns that his creator has summoned him for an important meeting that could change his life. However, Dr. Soong unknowingly summoned Data's twin brother Lore, into the bargain. Air Date : 8th-Oct-1990  Read More

Season 4 Episode 4 - Suddenly Human

Stardate: 44143.7. A custody battle between Picard and a child's adoptive father arises when a boy showing evidence of abuse is discovered. Air Date : 15th-Oct-1990  Read More

Season 4 Episode 5 - Remember Me

Stardate: 44161.2. Dr. Crusher begins to question her sanity when members of the crew start disappearing one by one, and all evidence of their existence is erased. Air Date : 22nd-Oct-1990  Read More

Season 4 Episode 6 - Legacy

Stardate: 44215.2. The Enterprise is caught in the middle of a civil war when they encounter Tasha Yar's long-lost younger sister, Ishara. Air Date : 29th-Oct-1990  Read More

Season 4 Episode 7 - Reunion

Stardate: 44246.3. Picard is asked to choose between two candidates to succeed the current Chancellor of the Klingon High Council as the new ruler of the Empire. Worf is disturbed by unexpected news when he is paid a visit by his former lover. Air Date : 5th-Nov-1990  Read More

Season 4 Episode 8 - Future Imperfect

Stardate: 44286.5. Riker awakens one morning to discover he is suddenly 16 years in the future as the captain of the Enterprise, and negotiating a peace treaty with the Romulans with no recollection of how he arrived at that point in time, or of any recent events. Air Date : 12th-Nov-1990  Read More

Season 4 Episode 9 - Final Mission

Stardate: 44307.3. Wesley must keep Captain Picard alive on the eve of his entrance exam to Starfleet Academy when their shuttle crashes on a barren moon. Air Date : 19th-Nov-1990  Read More

Season 4 Episode 10 - The Loss

Stardate: 44356.9. Troi loses her empathic abilities when the Enterprise is caught in the gravitational pull of a black hole. Air Date : 1st-Dec-1990  Read More

Season 4 Episode 11 - Data's Day

Stardate: 44356.9. A Vulcan Ambassador being escorted by the Enterprise starts exhibiting suspicious behavior. Miles O'Brien marries his fiancée, Keiko Ishikawa in Ten-Forward. Air Date : 7th-Jan-1991  Read More

Season 4 Episode 12 - The Wounded

Stardate: 44429.6. When the Cardassians start re-arming themselves, a Federation Captain takes it upon himself to remove a potential threat before it escalated. Now, Picard must fight for the Cardassians and stop the renegade from slaughtering innocents. Air Date : 28th-Jan-1991  Read More

Season 4 Episode 13 - Devil's Due

Stardate: 44474.5. The crew of the Enterprise must defend the planet Ventax from a mythological Devil who re-appears when a 1000 year long era of peace comes to an end. Air Date : 4th-Feb-1991  Read More

Season 4 Episode 14 - Clues

Stardate: 44502.7. Picard orders a secret investigation when the crew suspects Data of lying about the discovery of a wormhole. Air Date : 11th-Feb-1991  Read More

Season 4 Episode 15 - First Contact

Riker is abducted by a xenophobic race of aliens during a first contact mission. They believe the Enterprise is a scout for an invasion. Air Date : 18th-Feb-1991  Read More

Season 4 Episode 16 - Galaxy's Child

Stardate: 44614.6. Geordi must work with the real Leah Brahms when she arrives on the Enterprise when a space-borne alien life form thinks the ship is its mother. Tensions rise when she learns that Geordi created a holographic version of her several months before in order to save the ship from danger. Air Date : 11th-Mar-1991  Read More

Season 4 Episode 17 - Night Terrors

Stardate: 44631.2. Troi faces a recurring nightmare when the Enterprise is caught in a rift in space. Soon, the crew begins to slip into insanity through dream deprivation. Air Date : 18th-Mar-1991  Read More

Season 4 Episode 18 - Identity Crisis

Stardate: 44664.5. Geordi and a former crew mate begin evolving into bizarre creatures when they return to a planet both of them were on during an Away Mission five years earlier. Air Date : 25th-Mar-1991  Read More

Season 4 Episode 19 - The Nth Degree

Stardate: 44704.2. An alien probe transforms Barclay from a shy, awkward character into an arrogant super-genius who is able to interface with the Enterprise's computer through the holodeck. Air Date : 1st-Apr-1991  Read More

Season 4 Episode 20 - Qpid

Stardate:44741.9. Q places Vash and the senior Enterprise crew in a recreation of Robin Hood and his merry men. Air Date : 22nd-Apr-1991  Read More

Season 4 Episode 21 - The Drumhead

Stardate: 44769.2. Picard is accused of treason when an explosion aboard the Enterprise is investigated by a ruthless and paranoid Starfleet Admiral. Air Date : 29th-Apr-1991  Read More

Season 4 Episode 22 - Half a Life

Stardate: 44805.3. Lwaxana Troi falls in love with a man who must return home to commit suicide, as is customary for their race when they reach a certain age. Air Date : 6th-May-1991  Read More

Season 4 Episode 23 - The Host

Startdate: 44821.3. Dr. Crusher falls in love with a Trill Ambassador, until she discovers the Trill's symbiotic relationship. Air Date : 13th-May-1991  Read More

Season 4 Episode 24 - The Mind's Eye

Stardate: 44885.5. While en route to Risa for shore leave, Geordi is abducted by the Romulans and brainwashed into becoming an assassin. Air Date : 27th-May-1991  Read More

Season 4 Episode 25 - In Theory

Stardate: 44932.3. Data experiences the complexities of love when a fellow crewmate becomes attracted to him. Air Date : 3rd-Jun-1991  Read More

Season 4 Episode 26 - Redemption (1)

Stardate: 44995.3. Worf must choose between his people and the Federation when a civil war threatens to destroy the Klingon Empire. Air Date : 17th-Jun-1991  Read More