Stranger in a Strange School is a Detentionaire fan fiction in the works by Jall. The fan fiction can be found on Fanfiction.net and Deviantart, on those sites Jall is called Jet556.
The plot centres around a new student at A. Nigma. His name is Basil Hagen and he is in Lee's first period class and Tina's second period class. The problem with Basil is that it doesn't seem like his head is all there or as some think, that he is in a trance. Lee and Tina both believe Basil to be connected to their respected investigations and thus want to find out what is wrong with him every time he shows up, seemingly as a foil to them.