"Journey into Mystery" is a comic book series published by Marvel Comics. It originally debuted in 1952 and featured a variety of stories, primarily in the horror and fantasy genres. The series is notable for introducing the character Thor, the Norse god of thunder, in issue #83 in 1962, which shifted the focus from horror to superhero themes. The series has undergone several revivals and reboots over the years, often exploring different characters and storylines. It has included various notable writers and artists, contributing to its legacy within the Marvel Universe. The title has also been associated with other characters, such as Loki and Sif, expanding its narrative scope.