come on! okay heres what happened in the second episode you'v gotta love it:

a crazed, vengeful drug dealer by the name of Mr Mad Twatter with a handle-bar moustache travels from rehab to go and be an English cover teacher in the class, where, coincidentally, the guy whose fake ID he has, and who owes him £300 for 3 ounces of skunk (which he doesn't have) is in, and hasn't handed in his English Coursework.