La’an bluffs a Broken Circle weapons buyer with an ”antimatter detonation switch,” something she tells Uhura she made up on the spot. In “Surrender” Jack Crusher pulled a similar trick on Vadic, implying a personal forcefield was actually an unknown weapon.
In the dilithium mines, Doctor M’Benga and Chapel see what appears to be a mostly constructed Starfleet ship.
When the ship enters space, Mitchell says she thinks it’s a Crossfield-class, like the USS Discovery. The ship does have a Crossfield-class saucer, but the secondary hull is very different.
Motion graphics art director for the series, Tim Peel, has confirmed on twitter that it is not actually a Crossfield-class.
The Crossfake’s transponder has its registry as NCC-1729.
Doctor M’Benga and nurse Chapel inject themselves with a serum that that makes them slower and weaker so that when they attack their Klingon captors they don’t completely overwhelm them. Not doing so would be considered a war crime, as Klingons are extremely bad a fighting as seen in many, many episodes including, but not limited to:
“The Trouble with Tribbles” - Klingons provoke Scotty, Chekov and other Enterprise crew to a fight, only to lose
“Star Trek: The Search for Spock” - A Klingon lord gets the jump on a Starfleet captain, and ends up dumped into a pool of magma like he’s trying to steal the One Ring
“House of Quark” - The head of a Klingon House attacks a small Ferengi and ends up stabbing himself to death
“Marauders” - A group of malnourished colonists fend of a group of armed Klingon warriors after only a day’s worth of Vulcan martial arts training
“The Vulcan Hello” - A Klingon Torchbearer attacked an unarmed Starfleet officer with a bat’leth and stabbed himself to death
Apparently in the Klingon Empire they do call them Klingon disruptors.
The D7-class battlecruiser we see appears to be a reuse of the CGI model introduced in “Through the Valley of Shadows”, perhaps with some updated textures.
Doctor M’Benga was able to use the Crossfake’s transponder communicate with the Enterprise in Morse 2. Morse code has been previously used in:
The SS Botany Bay’s call signal in “Space Seed” was broadcast in morse
Scotty tapped out ”stand back” before destroying the wall of the brig in “Star Trek: The Final Frontier”
The SS Mariposa’s distress beacon was an SOS in “Up the Long Ladder”
In “The 37’s” the *USS Voyager” discovered an SOS coming from a planet in the Delta quadrant
Harry is able to alert Tom Paris of sabotage aboard the Delta Flyer using morse in “Drive”
In “Mindwalk” Dal was able to send an SOS to the rest of the Protogies, but they assumed those were the only letters he would have memorized so they couldn’t use it to communicate back to him.
”They thought it worth their lives to prevent another war. Logical.” This follows Spock’s reasoning from “Star Trek: The Wrath of Khan” where he first says, ”Logic dictates that the needs of the many outweigh the needs of the few.”
The maneuvering pack Doctor M’Benga finds looks to be of the type introduced in “Brother”.
We see the D7’s nacelles reconfigure to ready weapons; “Elaan of Troyius” established that the nacelles also house disruptor cannons.
Spock is able to revive Chapel using CPR. We’ve previously seen Kirk use the technique to save the life of a child in “The Paradise Syndrome”, and Tendi do so with Boimler in “First First Contact”. It’s not entirely clear if Chakotay actually performed CPR on Janeway in “Coda” or if that was only part of a hallucination inflicted upon her by an alien entity.
Captain D’Chok’s armour has a similar design to the Klingon armour introduced in “Star Trek: The Motion Picture” and used all through TNG, DS9, VOY, ENT, and the TOS and TNG movies, but is gold, like the tunics Klingon soldiers wore during TOS.
D’Chok’s baldric bears a House symbol first seen in the DIS episode “Point of LIght” one by one of the members of the High Council.
Both House D’Ghor and House Kol wore gold armour in season one of DIS.
Spock states he ”[has] been known to” drink bloodwine. In “The Conscience of the King” Spock tells Bones that his father’s people were *”spared the dubious benefits of alcohol,” which might imply that they are not actually capable of becoming drunk from it. And in “Cease Fire” Soval declares that Vulcans do not drink, but he himself immediately makes an exception. Also, T’Pol, Sakonna, Tuvok, and Spock are all seen drinking at one point or another. And both Vulcan port and Vulcan brandy were introduced in “The Maquis, Part I” and “Repression” respectively.
Despite his claim, this is the first instance of Spock drinking bloodwine on screen.
Spock is hungover during his call with April, so perhaps even if Vulcans are spared the benefits of alcohol, they still experience the drawbacks, which could explain why they don’t drink. Except when they do.
When the map in April’s office resolves, a few locations can be made out
Deep Space 2
Galdonterre - The planet where Kang, Kor, and Koloth were able to track the Albino to in “Blood Oath”
Cestus - Cestus III is introduced in “Arena” as the planet where the Enterprise beams down to have dinner at an observation outpost only to find it’s been razed by the Gorn
What is a probable Gorn attack ship - in the Gorn Hegemony they just call them ships.