When does Young Person's Guide to History return?

Adult Swim is a programming block broadcast by Cartoon Network during the evening, prime time, and late-night dayparts. First broadcast on September 2, 2001, Adult Swim has aired animated sitcoms, adult animation features, mockumentaries, sketch comedy, and pilots, with many of its programs being aesthetically experimental, transgressive, improvised, and surrealist in nature. Block grew out of Cartoon Network's previous attempts at airing content appropriate for adults who might be watching the channel after 11 pm (ET/PT)