When the Canterbury survivors are taken aboard the Donnager, they're identified via a scan of their neck implants.
Technological implanters are currently part of the Grinder community, and don't have anything as technologically advanced as this. At this point, it's a miracle if you're newfound implant isn't accompanied by a visit to the hospital. However, theres is no reason to think that implants haven't progressed far beyond this. In fact (SPOILER ALERT) we do see some implants in the next episode. What isn't clear here is whether or not Mars is scanning an impant or extracting DNA for analysis. Either way, both of these methods imply some sort of solar-system-spanning database of every person ever born. With a population of over 34 billion people this would be no easy task.
196023
We thought Havelock was gettin' some lovin' from the lovely Gia (especially after presenting her with that cute little potted cactus at the end of Episode 2), but no, they're actually engaged in private lessons on Belter language and gestures.
Belters developed a culture around life in 0g. A big part of this cultural evolution is the change in language that occured around the belt. While a large part of the language seems to be an odd blend of creole and pidgin languages, as well as some completely new words and grammar, a unique aspect of this language is the overly expressive hand gestures. If the Belter language did indeed develop in 0g it would make all kinds of sense for hand gestures developed in the vacuum of space to be easy to see.
196024
Lt. Lopez (Greg Bryk from Bitten, FYI) is a master Martian interrogator, partly due to his ingestion of 'focus pills' that allow him to be hyper-aware of the captive's emotional state and body language … effectively turning him into a human lie detector.
This might just be the natural evolution of adderall, but it seems like there's a whole lot more to it than that. Lopez is able to distinguish lies from truth when he takes this pill with no apparent side effect or withdrawal symptom. While pharmaceuticals will no doubt improve by leaps and bounds, it seems more likely that they would simply improve the polygraph technology as opposed to starting from square one with a chemical-based solution. This concept is undoubtedly cool, but might be out of the realm of possibility.
196021
After a hard day on his feet, Miller likes to kick off his shoes (and socks) and continue his search for Julie Mao with the help of hologram maps, which can be displayed three-dimensionally.
Just earlier this year, Microsoft announced the arrival of Windows Holographic. With this technology one can see and interact with 3-D images. Pinch them, pull them, tap them and flick them away. One can "select" a hologram just by looking at it, and walk around them in 3-D space.
Not so fast! In order to see and "touch" the holograms, you have to wear a special headset called the HoloLens, but getting rid of the middle man, in this case the Hololens, seems to be a technological inevitability.
