《大理石黄蜂》最后一作（第三季），囊括了entries 53到87。 The series follows Jay (Troy Wagner), a young man trying to discover what transpired during the filming of his friend Alex's film school project, which was titled Marble Hornets. Alex had been filming the project sporadically for about two months before suddenly stopping without any explanation. Afterwards, Alex withdrew from society and his friends, never mentioning the tapes until Jay persuaded Alex to give them to him. Alex handed them over, but with the explicit instructions that Jay was to never mention the tapes to him again. Alex then transferred schools and dropped out of contact with Jay. Three years later, Jay remembers the tapes and begins to watch them in order to find out why production was stopped. Shortly thereafter, Jay begins to experience strange and eerie phenomena surrounding the tapes and a mysterious persona known only as "The Operator" who later reveals himself as Slender Man.