Critical Role is an American web series in which a group of professional voice actors play Dungeons & Dragons. The show started streaming partway through the cast's first campaign in March 2015. Campaign one ended in October 2017 after 115 episodes, and campaign two started in January 2018 and ended in June 2021 after 141 episodes. A number of one-shots were aired in the hiatus between the two campaigns. After campaign two was completed, the spin-off limited series Exandria Unlimited aired from June 2021 to August 2021. The third campaign aired from October 21, 2021 to February 6, 2025 with 121 episodes. The fourth campaign premiered on October 2, 2025. The first three campaigns featured Matthew Mercer as the show's Dungeon Master and were set in the Exandria campaign setting; Brennan Lee Mulligan of Dimension 20 serves as the Game Master for the fourth campaign which is set in Mulligan's setting of Aramán.