‘The Big C’ Season 4: Prepare for Cathy’s “Hereafter” with Emotional New Trailer February 12, 2013 News, The Big C It’s time to say goodbye to Cathy Jamison. Showtime’s hit series The Big C will come to an end this year, and the premium channel has released a bittersweet trailer that makes it clear the series’ fourth and final season will be a tear-jerking event. As previously reported, the final season will shake up the format of the half-hour dramedy, by extending each episode’s length to an hour for the series’ four-episode swan song, which is likely a good thing, as the hearts of the fans will only be able to take so many moments like the tearful confession Cathy makes to her son in the trailer. Watch it for yourself below and be sure to check out our What to Expect article for more sneak peeks of what’s ahead. The Big C: Hereafter premieres Monday, April 29th at 10PM ET/PT on Showtime.