Legend. Trailblazer. A living god. There are but few competitors in reality TV history that inspire such awe: Sandra Diaz-Twine, Christian Siriano, Shea Couleé, Michael Voltaggio, Kelly Clarkson.

This time it's Karen, who descends from a ... portrayed that you can't look away. Season 4 is easily the show's darkest season, but it's also "Shameless" at its most grounded and nuanced.

In the TLC show's season 4 supertease, Karen and Deon continue to navigate the challenges of parenting 14 children. However, the twosome is also dealing with the introduction of a new potential ...