This weekend, several TV providers are offering customers Showtime, Showtime On Demand, Showtime Anytime, and Showtime online streaming for free. Scroll down and look for the the list of providers and what they offer for free this weekend. Here is a screenshot for your preference. Participating networks include DirecTV, DISH, Mediacom, RCN, AT&T, Verizon, and more. It includes episodes from Showtime original programming, such as Homeland, Shameless, and Penny Dreadful.