<Li> Mark Steger as the Monster, a creature that exists in the Upside Down . Referred to as "the Demogorgon" by Mike, Lucas and Dustin . </Li> <Li> Catherine Dyer as Connie Frazier, Brenner's FBI enforcer who has no qualms about murdering those who have come into contact with Eleven . </Li> <Li> Randy Havens as Scott Clarke, the boys' teacher . He encourages their interest in science and technology and helps them whenever asked . </Li> <Li> Hugh Holub as the lead scientist at Hawkins Laboratory . </Li>

When is season 3 of stranger thibgs coming out