page_title: Knots Untie
section_title: Production
hierarchical_section_title: Knots Untie / Production
caption_attribution_description: English: Walker Stalker Con, Atlanta, GA, October 28-30, 2016
context_page_description: "Knots Untie" is the eleventh episode of the sixth season of the post-apocalyptic horror television series The Walking Dead, which aired on AMC on February 28, 2016. The episode was written by Matthew Negrete and Channing Powell, and directed by Michael E. Satrazemis.
  The Hilltop Colony is introduced in this episode, as well as many characters from the comic books, most notably Gregory, who is played by Xander Berkeley.
context_section_description: This episode marks the first appearance of comic book character Gregory, who is portrayed by Xander Berkeley. His casting was originally announced in September 2015, and his role was confirmed to be Gregory in January 2016.
caption: Xander Berkeley made his first appearance as Gregory in this episode.
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