No gore. In terms of violence, the worst it has gotten so far is a few instances of characters aggressively smashing something. Guns are only ever featured in retrospect, unless you count Nerf blasters.
Profanity
None
Alcohol, Drugs & Smoking
None
Several times, Matt drinks water and jokes that it is vodka. But it's really just water.
Frightening & Intense Scenes
Moderate
The series features multiple plot elements that some may find disturbing, such as unethical experimentation, mind control, and murder, among other things. Most of the time, these elements are merely discussed, but we often get a glimpse of them onscreen, via old recordings or security footage.
In a few episodes, painful screaming is heard over a recording.