59 Years Later, Star Trek Finally Reveals The Deadly Weapon Klingons Used On Nimoy’s Spock

Published Aug 14, 2026, 8:30 AM EDT John Orquiola is a New & Classic TV Editor, Senior Writer, and Interviewer with a special focus on Star Trek. John has over 5,000 published articles at SR, and he has interviewed the biggest names in Star Trek on the red carpet and VIP events, among other beloved shows, movies, and franchises. Sign in to your ScreenRant account Warning: SPOILERS for Star Trek: Strange New Worlds Season 4, Episode 4 - "A Case Of Chiaroscuro"After 59 years, Star Trek: Strange New Worlds finally reveals the Klingons' deadliest weapon from Star Trek: The Original Series' 23rd century era. Directed by Meera Menon and written by Skylar Ojeda and Dana Horgan, Star Trek: Strange New Worlds season 4, epsiode 4 is a film noir ode to Casablanca, stranding the crew of the Starship Enterprise on a world occupied by the Klingons. In Star Trek: Strange New Worlds season 4, episode 4, "A Case of Chiaroscuro," Commander Una Chin-Riley (Rebecca Romijn), Dr. Joseph M'Benga (Babs Olusanmokun), and Ensign Nyota Uhura (Celia Rose Gooding) must go undercover during the Klingon occupation of Mat'aar XII. Una poses as her doppelgänger, Nevette, a Klingon collaborator who secretly leads Mat'aar's resistance. However, Uhura is apprehended by the Klingons and questioned by Ma'taar's occupying governor, Commander Kor (Demore Barnes). Strange New Worlds retcons Kor, who is the same Klingon warrior played by John Colicos in Star Trek: The Original Series season 1's "Errand of Mercy," which was the first appearance of the Klingons in Star Trek. Star Trek: Strange New Worlds Finally Reveals The Klingons’ Mind Scanner In a surprise, Star Trek: Strange New Worlds season 4, episode 4 finally showed the Klingons' mind scanner. Commander Kor (John Colicos) spoke with pride and reverence about the Klingons' sinister weapon in Star Trek: The Original Series' "Errand of Mercy." Here's how Kor described the mind scanner in 1967: "It's a mind-sifter or mind-ripper, depending on how much force is used. We can record every thought, every bit of knowledge in a man's mind. Of course, when that much force is used, the mind is emptied. Permanently, I'm afraid. What's left is more vegetable than human." Star Trek: Strange New Worlds reveals that the mind scanner is a desktop-sized device, although "Errand of Mercy" described a specialized "examination room," with lights refracting and sounds emitting as the victim's mind is probed. Amusingly, the edge of the mind scanner pointed at its target has ridges that resemble Geordi La Forge's (LeVar Burton) VISOR in Star Trek: The Next Generation. Despite Commander Kor's hype about the mind scanner, it was never seen in "Errand of Mercy," and it was not mentioned again after Star Trek: The Original Series. The Klingons were redesigned in Star Trek: The Motion Picture, which continued in Star Trek: The Next Generation. Now a warrior culture with their own code of honor, the Klingons hewed less towards weapons like the mind scanner. Star Trek: Strange New Worlds season 4 takes place about 5 years before "Errand of Mercy," so it's now established that the mind scanner was in use throughout that period, specifically by Commander Kor, its biggest fan. However, "A Case of Chiaroscuro" also plants the seed for why the Klingons abandoned the mind scanner. Strange New Worlds Retconned Uhura Meeting Commander Kor Before Kirk & Spock Star Trek: Strange New Worlds season 4, episode 4 establishes that Ensign Uhura survived the Klingon mind scanner about five years before Mr. Spock (Leonard Nimoy) did the same in Star Trek: The Original Series. Uhura also faced Commander Kor and gained the Klingon leader's respect for enduring the mind scanner. "Errand of Mercy" established that Spock survived the Klingon mind scanner because of his Vulcan "mental disciplines." Kor implies that the Klingons sicced the mind scanner's higher settings on Spock, to no avail. However, it's much more surprising that Uhura beat the mind scanner. As seen in "A Case of Chiaroscuro," Uhura's interrogation required her to identify objects, which she consistently claimed were a "tree." Uhura leaned into Dr. M'Benga's advice to create a false identity for herself that is based on truth. Thus, Uhura told the truth that she wasn't part of the resistance and gave honest details about her past, and it was enough to satisfy Kor and the mind scanner. Yet it doesn't seem like Kor used the mind scanner's highest settings on Uhura and decided the girl didn't have the information he was looking for. However, given that Uhura beat the mind scanner in Star Trek: Strange New Worlds, followed by Spock doing the same in Star Trek: The Original Series, perhaps this led the Klingons to ditch the mind scanner as a failure. Stardate 47988.1 · Crew Assessment The Final FrontierTrivia Challenge 🚀ShipsEnterprise! ⭐CrewMake it so ☠EnemiesResistance is… ⚡TechWarp speed! 📖LoreLive long… ENGAGE → 01 The USS Enterprise is the most iconic starship in science fiction. What is the registry number of Captain Kirk’s original Enterprise from The Original Series? ANCC-1701-D BNX-01 CNCC-1701 DNCC-74656 ✓ Correct! NCC-1701 is the registry of Kirk’s original Constitution-class Enterprise. The “-D” suffix belongs to Picard’s Galaxy-class ship, NX-01 is Archer’s Enterprise, and NCC-74656 is Voyager. ✗ Red alert! The answer is NCC-1701. Kirk’s original Constitution-class Enterprise carried this now-legendary registry. NCC-1701-D is Picard’s Enterprise from TNG, NX-01 is Captain Archer’s, and NCC-74656 belongs to Voyager. NEXT → 02 Kirk’s most trusted officer is a half-human, half-Vulcan science officer famous for his logic and iconic salute. Who is this legendary character? AData BSpock CTuvok DSarek ✓ Correct! Mr. Spock, played by Leonard Nimoy, is the half-Vulcan science officer whose “Live long and prosper” salute became a cultural icon. His struggle between logic and emotion defines the heart of the Original Series. ✗ Red alert! The answer is Spock. Data is an android from TNG, Tuvok is Voyager’s Vulcan tactical officer, and Sarek is Spock’s Vulcan father. Only Spock is the half-human, half-Vulcan first officer of Kirk’s Enterprise. NEXT → 03 Starfleet’s most important regulation forbids interference with the natural development of alien civilizations. What is this guiding principle called? AThe Temporal Accord BGeneral Order One CThe Omega Directive DThe Prime Directive ✓ Correct! The Prime Directive (also known as General Order 1) is Starfleet’s most sacred law. It prohibits interfering with less-developed civilizations — though Kirk, Picard, and Janeway have all famously bent or broken it when lives were at stake. ✗ Red alert! The answer is the Prime Directive. While “General Order One” is technically another name for it, the Prime Directive is the universally known term. The Omega Directive and Temporal Accord are separate, more specialized Starfleet protocols. NEXT → 04 “Resistance is futile.” This chilling declaration belongs to a cybernetic collective that assimilates entire civilizations into its hive mind. What is this fearsome species called? AThe Borg BThe Dominion CThe Romulans DSpecies 8472 ✓ Correct! The Borg are Star Trek’s most terrifying villains — a hive-mind collective that forcibly assimilates species and technology. Captain Picard was famously assimilated and transformed into Locutus in the landmark TNG episode “The Best of Both Worlds.” ✗ Red alert! The answer is the Borg. The Dominion is the Gamma Quadrant empire from DS9, the Romulans are a rival empire, and Species 8472 is actually one of the few species that the Borg themselves fear. Only the Borg declare “Resistance is futile.” NEXT → 05 Captain Jean-Luc Picard commands the Enterprise-D in The Next Generation and later received his own series, Star Trek: Picard. Which acclaimed actor portrays him? AWilliam Shatner BAvery Brooks CPatrick Stewart DScott Bakula ✓ Correct! Sir Patrick Stewart brought gravitas, Shakespeare, and Earl Grey tea to the captain’s chair for seven seasons of TNG, four films, and three seasons of Star Trek: Picard. His “Make it so” is one of TV’s most iconic catchphrases. ✗ Red alert! The answer is Patrick Stewart. William Shatner plays Captain Kirk, Avery Brooks is Captain Sisko on Deep Space Nine, and Scott Bakula captains the NX-01 Enterprise. Only Sir Patrick Stewart portrays the legendary Jean-Luc Picard. NEXT → 06 Starfleet vessels travel faster than light by bending space around them using a matter-antimatter reaction. What is this propulsion system called? ATranswarp Drive BWarp Drive CSlipstream Drive DSpore Drive ✓ Correct! Warp Drive is the standard faster-than-light propulsion in Star Trek, powered by dilithium-regulated matter-antimatter reactions. Zefram Cochrane invented it in 2063, which led to humanity’s first contact with the Vulcans. ✗ Red alert! The answer is Warp Drive. Transwarp is an advanced Borg technology, Slipstream is an experimental quantum drive, and the Spore Drive uses mycelial network navigation (from Discovery). Standard Starfleet vessels use Warp Drive. NEXT → 07 At Starfleet Academy, cadets face a notorious no-win scenario designed to test their character under impossible circumstances. James Kirk is the only cadet who ever beat it — by cheating. What is this test called? AThe Prometheus Trial BThe Omega Simulation CThe Corbomite Maneuver DThe Kobayashi Maru ✓ Correct! The Kobayashi Maru is an unwinnable rescue simulation that tests how cadets handle certain death. Kirk reprogrammed it so he could win — earning a commendation for original thinking. It was memorably featured in Star Trek II: The Wrath of Khan. ✗ Red alert! The answer is the Kobayashi Maru. The Corbomite Maneuver is a TOS episode, not an Academy test. The Kobayashi Maru is the famous no-win scenario that Kirk defeated by reprogramming the simulation — because he doesn’t believe in the no-win scenario. NEXT → 08 In the widely regarded greatest Star Trek film, a genetically enhanced superhuman from Earth’s past seeks revenge against Captain Kirk. “KHAAAAN!” Who is this iconic villain? AKhan Noonien Singh BGeneral Chang CQ DGul Dukat ✓ Correct! Khan Noonien Singh, played by Ricardo Montalbán, is Star Trek’s greatest villain. First appearing in the TOS episode “Space Seed,” he returned in The Wrath of Khan (1982) for a devastating revenge plot that cost Spock his life. ✗ Red alert! The answer is Khan Noonien Singh. General Chang is a Klingon from Star Trek VI, Q is TNG’s omnipotent trickster, and Gul Dukat is DS9’s Cardassian antagonist. Only Khan inspired Kirk’s legendary scream across the cosmos. REVEAL MY SCORE → Mission Complete Your Starfleet Record / 8 Are you an Admiral — or still a cadet on deck-scrubbing duty? ↻ RE-ENGAGE Star Trek: Strange New Worlds season 4's new episodes premiere Thursdays on Paramount+ Release Date 2022 - 2027-00-00 Network Paramount+ Showrunner Henry Alonso Myers, Akiva Goldsman Directors Dan Liu, Amanda Row, Maja Vrvilo, Akiva Goldsman, Dermott Downs, Eduardo Sánchez, Jeffrey W. Byrd, Jonathan Frakes, Jordan Canning, Leslie Hope, Valerie Weiss, Sydney Freeland, Christopher J. Byrne, Rachel Leiterman Writers Onitra Johnson Franchise(s) Star Trek Creator(s) Akiva Goldsman, Alex Kurtzman, Jenny Lumet