castle
house
how i met your mother
the office
the walking dead
mad men
SGU
QI
chuck
30 rock
the daily show

several of those aren't exactly high quality entertainment, and several others used to be worth watching but now i just watch because, well, i've become invested and want to know what happens.

edit: i'm also watching glee but really it's just filling me with rage pretty much every minute of every episode so it's really standing on the knife's edge