<Tr> <Th> Website </Th> <Td> www.geekandsundry.com/shows/critical-role </Td> </Tr> <P> Critical Role is an American web series produced by Geek & Sundry in which a group of professional voice actors play Dungeons & Dragons . The series is broadcast live on Thursdays at 19: 00 PT on the Geek & Sundry Twitch channel and Project Alpha, with VODs made available on Geek & Sundry's website, VRV and YouTube channel the following Monday . </P> <P> Matthew Mercer serves as the show's Dungeon Master, running an ongoing campaign that is the basis for the show . The campaign began two years prior to the series as a one - time simplified Dungeons & Dragons 4th edition game for Liam O'Brien's birthday . The group enjoyed this initial game so much that they continued to play, switching to Pathfinder, and continuing their story as the Super High Intensity Team . Felicia Day had heard about their private home game from Ashley Johnson and approached the group about doing it on - stream with Geek & Sundry . In order to streamline gameplay for the live show, the game's characters were converted from Pathfinder to Dungeons & Dragons 5th edition before the web series began airing on March 12, 2015 . </P> <P> Critical Role is a mixture of a traditional weekly show and a modern gaming Twitch stream . Each episode runs from 3 to 5 hours, is streamed live, and is made available on Geek & Sundry's Twitch channel immediately after airing to their more than 36,000 subscribers and to their YouTube channel the following Monday . </P>

When did the first episode of critical role air