From the very start, Lt. Commander Data was one of Star Trek: The Next Generation's best characters, and "Datalore" dives into the android's backstory. When the Enterprise visits Omicron Theta, the planet where Data was originally found, they discover the disassembled body of Data's brother, Lore (Brent Spiner). Lore wreaks havoc on the Enterprise before Data and Wesley Crusher (Wil Wheaton) beam him into space.
"Datalore" may not be a perfect episode of Star Trek, but it lays the groundwork for many of the Data stories that come after. Plus, Brent Spiner gets to have a lot of fun as Lore, who is much less subtle and more expressive than Data. Lore's future episodes are better than "Datalore," but the season 1 episode is fun nevertheless and provides interesting insight into Data as a character.
6"Heart Of Glory"
Star Trek: The Next Generation Season 1, Episode 20
Star Trek: The Next Generation's first Klingon episode reveals more about Lt. Worf (Michael Dorn) and lays the groundwork for the honor-based society of the TNG-era Klingons. When the Enterprise rescues three Klingons from a damaged freighter, Worf discovers that not all Klingons have the same ideas about what it means to be a warrior. When one of the Klingons dies, Worf learns that the warriors were not being truthful about how they ended up in their predicament.
Although the remaining two Klingons try to get Worf to join them, he refuses. Both Klingons end up dying, one by Worf's hand, when they attempt to take over the Enterprise. "Heart of Glory" reveals that Worf was raised among humans and marks the beginning of his journey to reconcile his Klingon heritage with his Starfleet duties. Star Trek: The Next Generation will deliver better Klingon episodes, but none of them would have been the same without the backstory established in "Heart of Glory."
5"The Arsenal Of Freedom"
Star Trek: The Next Generation Season 1, Episode 21
When the Enterprise-D travels to Minos to investigate the disappearance of the USS Drake, they find the planet guarded by a powerful automated weapons system. Soon after Riker, Data, and Lt. Tasha Yar (Denise Crosby) beam down to the planet, Riker is trapped in a strange force field. This prompts Captain Picard and Dr. Beverly Crusher (Gates McFadden) to beam down, but they fall into a bit when the sentry probes attack again.
While Picard and an injured Crusher are trapped in a cavern, they almost confess their feelings for one another, but Gene Roddenberry reportedly nixed the final confession.
Meanwhile, Lt. Geordi La Forge (LeVar Burton) is left in command of the Enterprise. Geordi rises to the occasion, adeptly defending the ship against a defense probe while dealing with an insubordinate officer. In an anticlimactic ending, Picard shuts down the system by assuring the automated salesman (Vincent Schiavelli) that he'll make a purchase. But the episode is nevertheless enjoyable and has some fun moments as the crew avoids the increasingly powerful attacks from the planet.
4"11001001"
Star Trek: The Next Generation Season 1, Episode 15
In "11001001," four aliens known as Bynars come aboard the Enterprise to perform a routine maintenance check and upgrade some of the ship's systems. The Bynars live and work in pairs, and every member of their species is connected to a supercomputer on their homeplanet. When a supernova threatens this computer, the Bynars attempt to hijack the Enterprise to save their people.
The Bynars have not appeared in live action again but are mentioned in Star Trek: Enterprise and later return in Star Trek: Lower Decks season 4.
As the Bynars work, they upgrade the holodeck, producing a particularly lifelike program to distract Commander Riker and, later, Captain Picard. Riker becomes entranced by a holodeck woman named Minuet (Carolyn McCormick), who is more realistic and sophisticated than any other holodeck character he has encountered. The Bynars are fascinating aliens, and "11001001" delivers a solid sci-fi story with some fun moments.
3"The Big Goodbye"
Star Trek: The Next Generation Season 1, Episode 12
Star Trek's first holodeck episode sets the precedent for future holodeck stories, for both good and ill. The story follows Captain Picard as he embarks on a holodeck adventure as hard-boiled detective Dixon Hill. Accompanied by Data, Dr. Crusher, and historian Dr. Whalen (David Selburg), Picard works to solve a classic murder mystery. However, when an alien probe scans the Enterprise, a power surge in the holodeck causes it to malfunction.
With the security protocols disabled, Whalen gets shot by a real bullet, and Dr. Crusher works to treat his wound. Unable to leave the holodeck or communicate with anyone outside of it, Picard and his friends must stay alive until the rest of the crew finds a way to save them. "The Big Goodbye" is an incredibly fun episode of television that makes great use of the holodeck even as it establishes some of the problems that will continue to plague holodeck stories.
2"Conspiracy"
Star Trek: The Next Generation Season 1, Episode 25
After Picard uncovers some strange orders sent out by Starfleet, the Enterprise returns to Earth to investigate a possible conspiracy. Dr. Crusher eventually discovers that bug-like parasitic lifeforms have infected several top Starfleet officials and are controlling them. Picard and Riker follow one of the parasites to Lt. Commander Dexter Remmick (Robert Schenkkan), who is serving as the host for the giant mother parasite.
Originally, this episode featured a conspiracy of regular Starfleet officers, but Gene Roddenberry insisted on including the parasites, not wanting to tarnish Starfleet in that way.
In a surprisingly violent scene, Picard and Riker fire their phasers at Remmick, destroying his body as well as the giant parasite living inside of him. The ending of "Conspiracy" hints that the parasites will return, but the plotline was ultimately dropped, and the parasitic creatures were replaced with the Borg. It's a solid episode that leans more into horror than most episodes of Star Trek: The Next Generation and is a definite high point in the show's first season.
1"Where No One Has Gone Before"
Star Trek: The Next Generation Season 1, Episode 6
The sixth episode of TNG's first season, "Where No One Has Gone Before," marks the first real hints of the show's future success. When a Starfleet propulsion expert visits the Enterprise, accompanied by a powerful alien known as the Traveler, they inadvertently send the ship to the edge of the known universe. The Traveler sees potential in the young Wesley Crusher and urges Captain Picard to nurture him.
Wesley leaves to join the Travelers in TNG season 7 and returns several years later in Star Trek: Picard season 2 before making a more significant return in Star Trek: Prodigy season 2.
Wesley ends up helping the Traveler return the Enterprise to the Milky Way galaxy. The Traveler himself returns in TNG seasons 4 and 7 to check in on Wesley, becoming an important part of his Star Trek story. With strong performances from the guest stars, a fascinating new alien, and cool sci-fi concepts, "Where No One Has Gone Before" remains one of the highlights of Star Trek: The Next Generation season 1.