<P> `` Dreamscaperers '' is the nineteenth episode of the first season in the animated series Gravity Falls . The episode is the first of the two - part season finale , the second being `` Gideon Rises '' . It was first broadcast on July 12 , 2013 , on the Disney Channel . It was written by series creator Alex Hirsch , alongside Matt Chapman and Tim McKeon , and directed by Joe Pitt and John Aoshima . It marks the first appearance of Bill Cipher . </P>
<P> `` Dreamscaperers '' is the nineteenth episode of the first season in the animated series Gravity Falls . The episode is the first of the two - part season finale , the second being `` Gideon Rises '' . It was first broadcast on July 12 , 2013 , on the Disney Channel . It was written by series creator Alex Hirsch , alongside Matt Chapman and Tim McKeon , and directed by Joe Pitt and John Aoshima . It marks the first appearance of Bill Cipher . </P>
when does bill show up in gravity falls
when does bill show up in gravity falls
`` Dreamscaperers ''
`` Dreamscaperers ''