A lot of shows are on hiatus until after the Winter Olympics are over. Last day of the Olympics is February 20th, so I would guess the next new episode should be a week or two after that.
When I'm curious about new episodes of any show, I go to
You can put a show in the Search area near the top, and once you've found your show click on the "view all related listings" hyperlink near the top and it will show you all scheduled showings and the episode name with an (R) after all reruns. I'm not sure how they get their information, but I've found it pretty reliable over the years.