@transcendentempress Some of them have happy endings... well... sort of happy. And some happy moments... but basically the premise is "what if technology, but we lived in the mirror universe?"
It's worth knowing that Black Mirror is created by Charlie Brooker, who used to write for PC Zone, an old PC Gaming magazine in the 90's. Before that he wrote for one of the Amiga magazines. So dude knows computers quite well.
Anyhow "Bandersnatch" is something you just have to watch on Netlifx... because it's interactive. It's a choose your own adventure novel of sorts. Set aside several hours for it...
Oh and every Black Mirror thing has references to the previous episodes scattered throughout it. Like the characters will randomly hum a tune... it's the song from S1E2. Of there's a poster of a robotic dog... that's S4E5