Actress Melanie Lynskey will star in and executive produce Mushroom Murders, a new Paramount+ limited series based on the high-profile true crime case involving Erin Patterson and fatal. Paramount+ has greenlit Mushroom Murders, a six-episode limited drama series out of Australia starring and executive produced by Melanie Lynskey (Yellowjackets, Don't Say Good Luck). Mushroom Murders stars Melanie Lynskey as Erin Patterson in a six-part Paramount+ drama created by an Australian team.