All In with Chris Hayes is a news and opinion television program that airs weekdays at 8:00 p.m. ET on MSNBC. It is hosted by Chris Hayes, who previously hosted Up with Chris Hayes on MSNBC weekends. It debuted April 1, 2013.Similar to Up, the show's format consists of "long-form panel discussions in which the participants talk through several issues." The opening night had 859,000 total viewers, including 298,000 in the ages 25–54 demographic.