Spoilers for the animated series will be unmarked.
The animated miniseries Over the Garden Wall has received a number of tie-in comics by KaBOOM! Comics. These include:
- Over the Garden Wall (2014): A one-shot comic set between episodes two and three, written by Pat McHale and illustrated by Jim Campbell, and published November 2014. Collected in the trade paperback Tome of the Unknown.
- Over the Garden Wall (2015): A four-issue miniseries, also written by McHale and illustrated by Campbell, debuted August 2015. This miniseries covered events between the third and fourth episodes, as well as gave backstories for some supporting characters. Collected in the trade paperback Tome of the Unknown.
- Over the Garden Wall (2016–2017): A twenty-issue comic series that ran from April 2016 to November 2017, serving as both a sequel and a prequel to the animated miniseries. The main stories showcase Greg and Wirt's further adventures in the Unknown after the show's end, via a series of shared dreams that eventually also include Sara. Meanwhile, side stories covers the tale of how the Woodsman's daughter, Anna, and what happened to her, as well as more stories about the animal school.
- Over the Garden Wall: Hollow Town (2018–2019): A five-issue series that covers the experiences of Wirt, Greg, and Beatrice in a mysterious town filled with porcelain doll-people.
- Over the Garden Wall: Distillatoria (2018): A graphic novel in which the brothers find themselves back in their own world... but Beatrice (still a talking bluebird) has crossed over with them.
- Over the Garden Wall: Soulful Symphonies (2019): A five-issue series where Greg and Wirt meet a mysterious young woman named Sophie who wants them to audition for her new play.
- Over the Garden Wall: Circus Friends (2019): Another interquel story, the graphic novel has the trio having to work together with a duo of disgraced circus performers.
- Over the Garden Wall: The Benevolent Sisters of Charity (2020): Yet another interquel story, where Greg and Wirt take refuge in a mysterious woodland hospital known as "Benevolent Sisters in Charity Infirmary & Asylum." However, since animals aren't allowed, Beatrice and the frog have to stay outside.
These comics provide examples of:
- Arc Welding: The 2015 series does this for individual episodes of the main show. Examples include:
- How the characters got into the hay barrel they start episode 4 in.
- How the cast went from riding Fred the Horse at the end of episode 4 to Quincy Endicott's mansion in episode 5.
- How the Woodsman came to believe his daughter's soul was in the lantern.
- What happened right before Greg made up the song "Adelaide Parade" sung at the beginning of episode 3, along with additional reasons for Wirt and Beatrice getting into an argument over Wirt being too obedient.
- Ascended Extra:
- The Woodsman's daughter, Anna, gets a lot more attention in the comics, as her story is elaborated upon.
- Fred too gets the spotlight a few times in the comics. In the 2015 miniseries we learn his backstory, and the last four issues of the 20-issue series are dedicated to him telling the reader tales from the Unknown, like a parody of the hosts from the old EC Comics.
- Sara, who only had a small part in the original cartoon as the girl Wirt liked, becomes a major character in the 20-issue series.
- Chuck Cunningham Syndrome: Beatrice is notably absent from the 20-issue sequel series. While several characters from the cartoon return for cameos or side stories, Beatrice never does, neither in bluebird nor in human form.
- Companion Cube: Robber Raccoon, Greg's stuffed raccoon toy. Greg treats him as if he's alive, and a notorious criminal, though he never does anything an inanimate stuffed animal wouldn't.
- Covers Always Lie: The 20-issue series was notorious for this. Only rarely would a cover have anything to do with what was actually going on in the issue — far more often, the cover would depict things that happened in another issue, or it would just feature situations that didn't happen in the comic at all, frequently featuring characters that didn't even appear in the issue in question. Issues #5-8 are a particularly egregrious example; the covers seem to be telling a story of their own about Anna spotting Greg from her window as he is about to enter the forest, and then going out into the forest herself, presumably to look for him. Anna does not appear in either of those issues, and nowhere in the series does anything like this happen.
- Cryptic Conversation: Two girls browbeat Wirt into doing their chores and then give him vague and incomplete instructions that lead him to making stupid mistakes.
- The Dilbert Principle: Played for laughs in one issue where the general of hat-ship keeps promoting Wirt for doing absolutely nothing, while Greg gets reprimanded whenever he tries to help.
- Failure Is the Only Option: One issue has Beatrice confess that Adelaide isn't going to help them while the boys are stuck in animal form. Since the issue takes place before episode 6, naturally her confession won't be heard.
- Idiot Ball: Put on a sheet with two holes in them, then claim to be a ghost who can curse people, and Wirt will apparently believe you.
- Involuntary Shapeshifter: One issue has Wirt and Greg turn into animals after eating magic pears. Subverted, since it turns out the boys were just mugged for their clothes and are hiding in a tree.
- Named by the Adaptation: The Woodsman's daughter is revealed to be named "Anna."
- Naked People Trapped Outside: Happens to Wirt and Greg in the mini-series, after animals steal their clothes. Wirt claims that they still have some clothes, but not enough that he wants Beatrice to see.
- The "The" Title Confusion: Some official listings and versions of the cover show The Benevolent Sisters of Charity without the first "The".
- Toilet Humor: Beatrice deliberately brings up bowel movements in order to embarrass Wirt.
