Its probably the teen genius kid of a fired nurse wanting revenge, hacking past security doors (that use mechanical combo locks that somehow have been upgraded to emit digital beeps) to get into the hospitals basement.
There, he and a couple of mates of his, that form entire sentences out of slightly out-dated slang, put up their hoodies and tap away to grunge music.
The camera shows code, possibly actual C code or the cheap alternative HTML, scrolling up the screen faster than they type. What are they doing? Using an SQL injection attack? Crafting a Linux Kernel module to be modprobed into the hospitals server? Nope, they are "hacking" the admin password.
Maybe one of the kids is the "VR genius" and navigates the hospitals aging windows network using a very battered looking PSVR headset plugged into the wall.
While the hospitals systems fail, lights going out, microwaves exploding, hospital beds suddenly killing a patient, an old grey-beard hacker (of the white hat kind) offers his services. Having been at the hospital for a knee operation coincidentally at the same time, he tries to out-hack and even locate the attackers. He wins some, and loses some while making the observation that they are "really good". Eventually he manages to identify some information about the hackers that prompts one of the male Doctors to recognise one of them as the son of the nurse that he had a short relationship with before she was fired for gross negligence.
Deducing where they are before the armed police that have suddenly turned up, the Doctor heads for the basement. After a short search he finds a group of hoodie wearing teens, one of which would have been his stepson should he have not dumped his mum, due to the gross negligence thing.
They meet, like sandpaper meets paint, and discuss (very emotively) the situation, the past, the betrayals. Eventually the Doctor talks the lad around. Much to his mates disappointed slang filled shouting, the lad puts on the VR headset and begins to shut down the virus. Unfortunately, the virus was given A.I by the young hackers and is not going quietly (think lawnmower man here).
More people are thrown out of their hospital beds as the virus and hacker lad do battle. We already know the winner. The lads, now arrested by the armed cops are taken away. The Doctor and the lad glance at each other. He is worried. He says that he thinks part of the virus got out onto the net, and has a taste for hospital blood.
After the end credits we move to another hospital. The lights flicker. The coffee machine beeps and shakes a bit, scalding a nurse. A windows XP desktop in a corner of reception starts displaying multiple command prompt windows with the text "I AM HERE"
I seriously doubt that this episode will be that good, but possibly will be full of tropes and sterotypes.