The Rowdy Three are talking when Cross asks "how long have we been in here" Gripps responds "7,776,000". With 86,400 seconds in a day that totals 90 days exactly (right down to the second!).
Farah's varsity jacket has a large "D" with the word "Adams" emblazoned on it, for Douglas Adams. There is also a number "42" on her right shoulder sleeve. In The Hitchhiker's Guide to the Galaxy series by Douglas Adams "42" is the answer to life, the universe and everything.
When Suzie Boreton enters the concert she is wearing a "Lux Dujour" t-shirt, referencing the season one plot.
Tina's line, "I want to fuck everybody here!" was bleeped out on the original BBC America airing.