It is a true representation of the prison system. Sadly I have reason to know this.
I have a young close relative (adopted) in prison who is subjected to violence, extortion, drug pedlars etc. This person should not be in prison as they are autistic, brain-damaged by in utero drug use, drug addicted and mentally ill. They did commit a crime, but, had the proper services been available during their upbringing then the situation could have been avoided. It is also an inappropriate placement for a person who is mentally ill and vulnerable.
Consequently I found the programme agonising viewing - but did not switch off as it confirmed all that I had been told - all things that hardly bear credence.
The prison knows exactly what is going on and does zilch. I cannot help but conclude that prison officers are complicit in the drug trade in prisons - they have to be or the drugs simply would not get in.