The USS Callister is not a real ship, but a simulation.
Daley set it up somehow to act his out personal power fantasy, which is why the Spock/Tuvok expy shushes Cole when she's not impressed by the monsters—he's trying to stop her from breaking character, possibly because Daley punishes people who do (which may explain the shot of Cole's hands apparently melting/on fire later in the trailer). It also explains the "three cheers" thing.
- Assuming this is based on the trailer i'm just gonna congratulate you on basically knowing a big chunk of the plot
The one thing supposedly knocking this episode off the hardest of hard science fiction peg
is the "take their DNA and it has their memories" thing. What if, instead, there's some database paired with a kind of tracker system that exists in the universe, somewhat like the Arkangel system, that means by taking the DNA he's just kind of able to do a search-by-sequence to get all of the data of the person. Why people aren't so protective of their DNA (throwing away coffee cups instead of incinerating them) would be because they wouldn't expect someone to want to download their identity, or maybe wouldn't expect the average person to have the technology to do so. This would, actually, make Daly's actions even creepier, too.
The Crew of the USS Callister are going to be heralded as heroes both in game and in the real world.
Once the police investigate Daly's death and his crimes are exposed, both the real people and their digital counterparts will be vindicated. In game, given that they can go anywhere and do anything (they know the source code for Infinity) they'll soon become legends among the gaming community, befriending other gamers and exploring the game's universe in greater depth. Along the way, they may actually take other players on their ship. They may even end up providing help to people in the real world (gaming platforms have been used to get help to people who are in danger). Since the DNA scanner and lollipop that Daly had ends up in the Black Museum, it seems likely that they'll end up setting a major legal precedent for other copied and artificially created consciousness, as well as criminalizing Daly's actions (copying DNA and creating people for the purposes of abuse).
USS Callister character
Kirsten Dunsts brief and unnamed cameo role is... Gillian from Marketing! Got to be!
Daly was recording the series with himself as protagonist for posterity.
It was not just for his amusement, he planned to release the recordings of his gameplay in the future if he got enough power to do so. It would explain why he wanted them to play as if they were in a show (and even with bad acting from the clones). Of course, the parts where he was evil would not be included and he must spend some time (offscreen for us) editing. And, after the events we see there must be saved in his computer somewhere a potential "final episode" of the cut parts and final actions where the audience will know that he was evil all the time and then that the crew tricks him, escapes and get him deleted
(possibly aired several years after the public know about his death
and Walton wants to make some money off of that).
- While it really does seem that he loves his show so much he wants to be part of it as genuinely as possible, it does also look like he has a vendetta against new media (when he talks about Netflix at the beginning), so he may want to recreate some of the traditional series. Also, in real life, the people that revived the show Doctor Who in the noughties were massive Doctor Who nerds growing up, so there's certainly a precedent.
- It could also be a way that the police, when they start investigating, can find out about the evil actions of Daly and condemn him.
- And it links with the tech used to permanently trap tortured consciousnesses of Leigh in Black Museum: Daly would have had to be able to find a way of not just screen-recording, but to somehow record the actual lives and experiences of the clones in the mod. This also would mean that in his computer memory there's copies of them constantly living through the torture Daly put them through, and possibly that with Daly's mind trapped in the game there is a digital copy of him experiencing that forever even if he does die.
Walton's clone knew exactly what to do with the jet engine because of a past evil prank from Daly.
Daly used to punish Walton's clone since the creation of the mod, and when he fixes the engine he does it very fast and works like someone who knows how to manually start a space engine. With this in mind it's easy to conclude that in the past he was sent to fix it, perhaps Daly claiming it needed some minor tinkering, and has experienced the immediate restart and being incinerated alive before, which could also be why he doesn't mind
- Of course, there's also the buttons in the control room that work by plot. And the fact that Walton is probably quite a tech genius even if he's not at Daly levels. He probably knows his way around engineering, but even so there's a good chance that it could be a simple "pull the lever" kind of fixed because the mechanics of the ship function by plot. And he's desperate.
Nanette has broken into Daly's place before.
She easily broke into his apartment and, even being clumsy, was stealthy, stole things and escaped without being detected. Either she's a specialist thief, or very very lucky, or was there before stalking her idol.
- It wasn't much more complex than sneaking into your sibling's room to take a shirt. She was already on the ledge with directions from the clones to where stuff was, had watched and located it, and Daly was distracted; it was a really simple operation and far from the levels of a professional thief.