When are new episodes added? February 19, 2019 19:50 Updated New episodes are available on CartoonNetwork.com and the Cartoon Network app the day after they air on Cartoon Network. Related articles How long are episodes available? Where are all the classic cartoons like Scooby-Doo, Looney Tunes, and Tom and Jerry? Can I watch the Cartoon Network app on my mobile device or TV? Why am I being asked to log in? What if I am not receiving Closed Captions on my TV?