This discussion may contain spoilers!
Our dear friend Jack. For those who don't remember, in ep.1 Bigby finds a blue cloth fragment near where Faith's disembodied head is placed. Bigby claims the same material is used for jeans, that is seen being worn by Jack. If you take a look at ep.2 where Jack is first introduced, you will notice holes in his jeans but could it simply be a fashion statement or something more sinister?