While the Enterprise is on a medical mission to transport a sick child to a Starbase medical lab, Data begins acting oddly. Without warning, he turns off the life-support systems on the bridge, forcing the rest of the crew to evacuate. He then commandeers the ship by imitating Picard's voice and setting security codes so that only he can control all the crucial systems, and sets a new course to an unknown destination.
The crew is unable to regain control, but when they arrive at their destination, they discover that he was acting under compulsion. Data has an implanted homing device that was activated by his creator, Dr. Noonien Soong, who was thought to be dead. Dr. Soong has a gift for Data: a chip he's perfected that will give Data human emotions. However, when he activated the homing device, he also unintentionally summoned Data's "brother" Lore, who decides he wants the chip for himself.
Tropes featured in "Brothers":
- Advancing Wall of Doom: During his trek from the bridge to the transporter room, Data at one point initiates a "cascade sequence" with the forcefields that causes the one ahead of him to jump ahead by a few inches every few moments, in effect creating a moving wall that forces the security officers attempting to stop him to retreat.
- And I Must Scream: Discussed. Lore says he spent two years floating in space after his last encounter with Data and would still be out there if not for a passing Pakled ship.
- Ax-Crazy: The emotion chip makes the already emotionally unstable Lore into a full-blown Giggling Villain psychopath.
- The Bus Came Back: Lore, who had been found by the Pakleds at some point after "Datalore".
- Call-Back: Data still can't whistle "Pop Goes the Weasel."
- Calling the Old Man Out / Jerkass Has a Point: Lore chews out Dr. Soong for simply casting him aside to make Data instead of improving him. Dr. Soong tries to explain that he needed to use the experience of programming Data to learn how to fix Lore, but Lore isn't having it.
- Crazy-Prepared: Dr. Soong survived the Crystalline Entity because he always has an escape route prepared just in case. This becomes Fridge Brilliance after we encounter his ancestor in Star Trek: Enterprise, imprisoned for his own controversial research and with a habit of escaping as a hobby.
- Didn't See That Coming: Soong had no idea that Lore had been reassembled and also received the signal. Invoked In-Universe by Soong regarding the Crystalline Entity.
- Dramatic Irony: Jake and Willie parallel Lore and Data's relationship of an older brother mistreating the younger brother. Ultimately, though, Jake and Willie make up.Beverly: They're brothers, Data. Brothers forgive.
- Embarrassing Nickname: "Often Wrong" Soong.
- Failsafe Failure: There is no way that the bridge life-support systems would fail on their own, as Geordi points out; there are seven independent interlocks to prevent it. Data is able to seize absolute control of the ship's computer, mainly by virtue of the fact that, having sophisticated speech capabilities, he can precisely mimic Picard's vocal patterns and fool the voice biometrics authentication that the computer uses. The fact that "Picard" is giving verbal orders to the ship's computer from the bridge when he is actually in main engineering (location supposedly being something the computer tracks) does not hinder Data in any way. It could also have been avoided by requiring more biometric controls than just Picard's voice (like scanning his eyes and face too). It's really unsettling just how easily one android hijacks the entire Enterprise, and none of the security holes this reveals are ever mentioned or shown to be fixed.
- Feet-First Introduction: The camera focuses on Lore's boots as he enters Dr. Soong's lab.
- Genre Blindness: Soong has no problem reactivating Lore because he's always obeyed him in the past. Yeah, that always works out well for a Mad Scientist.
- I Did What I Had to Do:Lore: You did what you had to do? What kind of answer is that?
Soong: The best one I can give you. You were not functioning properly.
- "Just Joking" Justification: Jake let his brother Willie believe he had killed Jake during a game, claiming he just wanted to scare him. Willie, panicked, ran into a forest and ate a poisonous fruit after he got lost.
- Laser-Guided Amnesia: Justified, but not with identity. Data doesn't realize what he has done to get to Dr. Soong. The homing device activated a more dominant program. Only after Dr. Soong tells Data to access a certain program does he get his memory back.
- Luke, I Am Your Father: Dr. Soong reveals to Data that he is his creator, even though Data believed that he was dead.
- Mad Scientist: A benevolent version, but Soong has the same lack of thought over the morals and consequences of his actions. He summons Data against his will, inadvertently endangering a child's life, and reactivates Lore despite Data's repeated warnings.
- Mad Scientist Laboratory: We start at the requisite glass containers full of bubbling chemicals and lightning generators before panning across to the more homely aspects of Soong's hideout.
- Moral Luck: A boy pranks his younger brother, which scares the brother enough for him to run and hide. While hiding the younger brother eats a fruit that leaves him so ill he nearly dies. The older brother is severely scolded by numerous cast members for 'nearly killing' his brother. However, while a little cruel for a prank, there was no reason for the older brother to expect anything worse then his younger brother being frightened for a while because of it. This feels particularly horrible since a child that young would likely already be very guilt-ridden to the point of tears and any competent parent would go out of their way to tell the child that this wasn't his fault, not further scolding or blaming him. Especially as humans in the future are supposedly kinder.
- My God, What Have I Done?: Jake feels guilty about what happened to his brother and tries to apologize to Willie. Unfortunately, Willie doesn't want to talk to him at all.
- Narcissist: Dr. Soong examining Data, created in his own image. "I always loved that face."
- Nice Job Breaking It, Hero!: Nitpickers have noticed that what appears on the computer screen when Data dictates his insanely complicated lockout code is not the same as Data's spoken words, implying that the computer misheard him and that Data will never be able to recite the correct code to unlock it. Consequently, they reason, the Enterprise never left orbit; and the end of this episode, and the remainder of the entire series, is just the fevered imaginings of Data's guilt-ridden mind.
- No Plans, No Prototype, No Backup: Dr. Soong's emotion chip for Data. Borders on Forgotten Phlebotinum, since the contents of Soong's lab should have provided a wealth of information about the construction of androids.
- Offscreen Moment of Awesome: Lore being recovered by dull-witted Pakleds. One can only imagine...
- The fact that Lore shows up wearing a somewhat ill-fitting Pakled uniform does, however, call into question the fate of those hapless Pakleds—i.e., whether or not there's a pile of Pakled corpses somewhere in Lore's wake.
- Pet the Dog: Lore is genuinely upset when he hears his 'father' is dying. Subverted later when he accidentally kills him.
- Properly Paranoid: Dr. Soong created his escape route because he wasn't too trusting of the colonists. He admits he never envisioned having to run away from "a giant snowflake."
- Sanity Slippage: Lore was always unstable, but using an emotion chip not meant for him sent him to Crazytown.
- Sibling Rivalry: During their family reunion, Data is deeply affected when Soong asserts that he is not inferior to Lore (as Lore had previously claimed) and that they are in fact almost identical except for their programming. Lore feels that he was The Unfavorite given that Dr. Soong decided to move on and build Data rather than focusing on fixing Lore's personality disorders. He tricks Soong into giving him the emotion chip intended for Data by impersonating him.
- Spot the Imposter: "Often Wrong's got a broken heart, can't even tell his boys apart."
- Swiss Cheese Security: Averted, given the extensive effort and skill Data requires to hijack the Enterprise. At the same time, some basic safeguards are overlooked, such as the computer accepting commands from "Picard" on the bridge when it knows for a fact he's in Main Engineering. Pay attention, Voyager...
- This Cannot Be!: Lore's reaction to Soong's You See, I'm Dying.
- Too Dumb to Live: Although Lore committed mass murder by luring the Crystalline Entity to the planet where he and Data were built to wipe out all the colonists, Dr. Soong treats him like a mischievous child, insisting that he isn't evil, just misunderstood. This works out for him about as well as you'd expect.
- Unable to Cry:Data: You know that I cannot grieve for you, sir.
Soong: You will, in your own way.
- Wham Shot: Lore being the one to arrive at the lab.
- Whole Plot Reference: To the story of Isaac, Jacob, and Esau in the Book of Genesis. In short, Isaac was old, blind, and dying, and intended to give a blessing to his rightful heir Esau. But Esau's brother Jacob impersonated him and stole the blessing for himself. Soong even mumbles something about Esau at the very end of the episode.
- Xanatos Speed Chess: Data readjusts his strategy fairly quickly when site-to-site transportation is disabled.
- You See, I'm Dying: Word-for-word when Lore is about to simply walk out of the "family reunion." Soong gets him to stay by pointing out that they'll never have another chance to interact.
- Younger Than They Look: Possibly if what Dr. Ira Graves said about being Soong's mentor was true. Graves, while still old looking, didn't look anywhere as ancient as Soong does. This might be chalked up to makeup artists overdoing it when a younger actor is made up to play an elderly character.