During an interview, Robert Kirkman claimed Norman Reedus (Daryl) originally auditioned for the part of Merle Dixon. He was rejected, but his audition so intrigued the show-runners that they created the part of Daryl just for him.
In an interview on National Public Radio, Steven Yeun (Glenn) said that his parents (who emigrated from Korea as adults) watch the show faithfully but do not always understand the nuances of the English used in it, so they get a bootlegged version with Korean subtitles. Yuen also said that his father once asked him to thank Melissa McBride for saving his life. Even with Yeun remarking his father that it was all staged, he insisted his son to thank her, which he then did.
Originally, the characters of Lizzie and Mika were going to be cast as different gendered twins, with Mika being the boy named Mike; however after Kyla Kenedy's audition via Skype, they scrapped the idea so they could cast her.
Between seasons 1 and 5 Carl Grimes has only aged twice from age 12 to 14. However, actor Chandler Riggs will be 16 years old when Season 6 goes to air. This means there could be some sort of time jump (seen in the graphic novels) to ensure that the actor isn't too old for his role.
The description that Daryl gives of Merle's drug dealer (who most likely sold him blue sky meth considering he had it in his bag earlier in the series) sounds an awful lot like Jesse Pinkman from Breaking bad. The drug dealer has some sort of child in his life (Brock), in described physically as small and skinny, and says the word "bitch"
A walking dead companion series is set to take place in California, and come out late 2015. The companion series will have nothing to do with the original series, but will use new characters to give us a different view from the beginning of the apocalypse.
According to Norman Reedus, he accidentally incited a small panic among 'Walking Dead' fans when a photo surfaced of him sporting a prosthetic dismembered stomach. This photo does not spoil the end of Daryl Dixon, but rather Reedus' character in 'Pandorum.'
In an online interview, it was revealed that Frank Darabont envisioned having several self-contained episodes that would not continue the main story. One such episode would have been the season two premiere. It would have involved Sam Witwer (who Darabont used in The Mist (2007) and played the tank zombie in the series premiere) as a soldier in a Black Hawk Down (2001) styled Atlanta. Witwer's character would have encountered several of the cast before being bit and locking himself in the tank.
The actors portraying the walkers are actually more talented than one might think. They have to walk and sound like the creatures, while also avoiding breathing too much. They also have to jolt their limbs to take bullets realistically, and effectively pretend to eat fake human flesh.
Deanna, the leader of Alexandria, has the biggest character change from the comics. The leader in the comics is actually a man named Douglas. Deanna's husband, Reg, in named Regina in the comic, and is Douglas' wife.
The Season 2 premiere was an extended episode because budget cuts forced show runner Frank Darabont to combine the original premier "Miles Behind Us" with another episode titled "What Lies Ahead". Most of the cuts from "Miles Behind Us" can be found in the deleted scenes of the Season 2 DVD.
In Season 3, the beginning of the first and last episodes have the same camera sequence. In "Seed," the episode begins with a close-up shot of a walker's eye with the camera slowly zooming out. In "Welcome to the Tombs," the episode begins with a close-up shot of the Governor's eye with the camera slowly zooming out.
Daryl Dixon played by Norman Reedus while isn't in the comics that the show is based on but he does use a weapon that comic readers will be familiar with (the crossbow, wielded by Dwight in the comics)
In late 2015, there was a casting call for a character named Orin. A description for this character says that he is smart, brutal, inappropriate, hilarious, etc. It is rumored that he will show up at the end of season six. This character is most likely Negan.
The trivia items below may give away important plot points.
In the show, Michonne hates The Governor based on a hunch and he only loses an eye. However, in the graphic novels, he brutally rapes her for days, leading to the loss of his eye, arm, and testicle when she gets her revenge.
Dale had not originally been scheduled to die as early as he did in the show. However, after his close friend, Frank Darabont, was fired as showrunner, DeMunn asked to be killed off. Later, he had a change of heart, but his death had already been scripted and budgeted for, so his request to continue on the series was denied.
The last line of Season 4 on TV is "They're screwing with the wrong people". However, on disc, Rick says f-cking instead. Andrew Lincoln only did one take of the censored version because he liked the similarities to the comics.
The last five episodes of season 5 (Remember, Forget, Spend, Try, Conquer) are named based on a quote by Dale in season 1: "I like what a father said to son when he gives him a watch that had been handed down through generations... I give it to you not that you may REMEMBER time, but that you may FORGET it for a moment now and then and not SPEND all of your breath TRYing to CONQUER it."
The coat that Rick wears in the last episodes of season 4 and most of season 5 belongs to "Claimer Lou" the man he strangled in the bathroom at the house he Carl and Michonne were staying at after the prison
Seconds after the Season 5 mid-season finale 'Coda' ended, AMC's facebook page mistakenly shared a picture of Daryl carrying Beth's corpse, with the caption "RIP Beth". It was badly received by people who had not watched the episode yet in the West Coast, Europe and South America.
In the comics, during The Governor's prison attack, Judith is killed after Lori is shot and falls on top of her. The writers used this to worry comic book fans when Judith's carrier was filled with blood in Season 4, Episode 8.
In the season 5 premiere, when the Termites were slicing throats, the main cast members were not told about the prosthetic necks and fake blood that would ooze through the trough in front of them. This caused them to act as if they were surprised and as if they'd never seen anything like it.
The set used in the constuction site scene where Abe is collecting materials for Alexandria is actually the prison set after being stripped down. You can see this by looking at the building behind them. It has burn marks from the Governors attack.
In AMC's 'Breaking Bad', Walt rents a red Dodge Challenger from a man named Glenn. Coincidentally, Glenn Rhee from 'The Walking Dead' drives an exact model in the Season 1 episodes: 'Guts' and 'Tell It To The Frogs'.
A Greene family member has died in three of the four mid-season finales. Zombified Shawn and Annette Greene were put down by the group in season 2. Hershel was decapitated by The Governor in season 4. And Beth was shot by Dawn in season 5.
Beth's death in the season 5 mid - season finale caused an uproar on social media with fans sending hate mail and death threats to Scott Gimple along with boxes of plastic spoons being sent to the AMC studios (a reference to the silver Washington D.C. spoon Beth Found). A Change.org petition titled "Bring Beth Back" was also created and has collected over 60,000 signatures in only 3 months and was even discussed on "Good Morning America".
Baseball bats have been featured moreso throughout season five, possible to foreshadow a death like Glenn's comic book death, though with a different character. Kirkman debunked any predictions about Glenn dying in this way during an '@midnight' segment called 'Fake Spoilers'.
All of the seven main characters to die as of the end of the fourth season (Dale, Merle, Governor, Lori, Shane, Hershel) have all been brought down mercilessly by another character, whether it's before or after reanimation.
In the comics, Morgan Jones dies in the Wolves Alexandria Safe Zone attack where the Wolves let in an army of Walkers. This attack is foreshadowed in the Season 5 finale entitled "Conquer" where Morgan saves Daryl and Aaron from a mob of Walkers who come out of cargo trucks. Later in the episode, the Wolves are seen leading the same Walkers back into the trucks.
When Bob, Tyreese, Daryl, and Michonne hear the Terminus broadcast message from the radio, it was eight days before Bob would make his way there and nine days when Daryl and Michonne would. Tyreese does not enter Terminus
Many deaths in the show and the comic are similar, albeit with different characters. In the comic it is Carl who shoots and kills Shane and Rick who kills the walker Shane. In the show Rick stabs Shane and Carl shoots the undead Shane. Dale's fate is shared with Herschel and Bob. In the Book Dale loses a leg to a walker and the Hunters. In the comic book it is Tyreese who is beheaded by the Governor, in the show it's Herschel. In the show Tyreese is bitten on the arm and is chopped off by Michone, in the comic book it is Morgan Jones
Scott Wilson who plays Hershel Greene appeared in the 1999 TV movie "The Jack Bull" as a character called "Governor." Ironically, he gets killed by "The Governor" played by David Morrissey in "The Walking Dead."
At the end of the pilot episode when Rick is in Atlanta, the tank that he locks himself in to get away from the walkers is a British Chieftain Mark 11 tank and not an American M1 Abrams tank, as could be assumed.