- Matt barging in on Misty's interrogation of Jessica and saying "Jessica Jones, stop talking." is a reference to when Matt came to represent Jessica in Alias. The only difference is that in Alias, Matt had been sent by Luke Cage. Here, he's been sent by Foggy Nelson.
- When Misty and Colleen first meet in the 29th Precinct, the shirts they're wearing (orange for Misty, white for Colleen) mean they're wearing the very colors of their Daughters of the Dragon outfits.
- Danny and Luke are frequently paired together in scenes and bond quite a bit, even being the first two heroes to meet one another. This references their longstanding friendship and their famous Heroes for Hire series.
- The final scene of Matt recovering in the convent is taken straight from the famous Born Again story during Frank Miller's run.
- At the end of the series, Danny dons a tracksuit that has the color scheme of his classic costume from the comics.
- Speaking of, Danny assuming Matt's role as the protector of New York recalls the time Danny actually became Daredevil when Matt couldn't.
- When Colleen goes to visit Misty at the hospital to apologize for being responsible for getting her arm cut off, the patient care board on the wall behind Colleen has the nurse on call as Dr. Linda Carter, the original Night Nurse who became the first one who superheroes - including Luke Cage and Iron Fist - would turn to for secret medical assistance.
- In Matt's intro, he's cross-examining a guy named Mr. Berkowitz on the stand. It could be a subtle nod to Jake Berkowitz in The Punisher (1989).
- There's a poster in Cole's apartment for "Long Live The Chief" by Jidenna. The hip hop artist previously turned up performing this song in Luke Cage for Cottonmouth in his club.
- 613 is the number of the bus Luke gets off when he arrives back in Harlem. In the comics, Earth 613 is the reality in which Luke Cage became the Power Fist after a series of events kicked off by Steve Rogers' assassination. He went by the combined name Power Man and Iron Fist - which itself is later referenced by Danny Rand when they meet.
- Matt's first meeting with Jessica Jones is almost identical to his first meeting with Karen Page. In both cases, his appearance elicits the woman, who's in police custody because they were found with a dead body in their apartment, to give him a "who the hell are you" challenge and a look of bewilderment when he answers.
- With her revival, Elektra has finally adapted her iconic red comics costume. She also pauses in the armory when she sees her Okinawan sai - the weapons she always used in the comics and season 2.
- When Matt and Jessica interview John Raymond's daughter, Matt is the one who goes over to play the piano to find John's mysterious plans for Midland Circle. Matt has played the piano in the comics.
- It's revealed that Karen Page has now developed into the New York Bulletin's head writer, covering key legal cases (she turns up at Matt's court case in the first episode looking for a quote from him), and she's obviously risen up the ladder considerably between seasons. That's clear in the fact that she is now the occupant of Ben Urich's old office at the Bulletin, and perhaps as a mark of respect (and a nice little call-back to the MCU), she's kept Ben's framed front pages, including mention of the Battle of NY and the Harlem Terror.
- After a fakeout in Luke Cage season 1 when she got shot by Diamondback in the hostage situation, Misty Knight loses her right arm for real when it gets chopped off by Bakuto. This gets Misty now in line with her comic book backstory: on the page, Misty lost an arm following a bomb attack and she was fitted with a bionic arm that gave her superhuman strength by Tony Stark. Here, Misty's new bionic arm is courtesy of Danny pulling strings to arrange communications with a robotics company that is owned by Rand, and while the arm loss happens in correlation with an explosion, the explosion isn't the cause of her losing her arm.
- When Matt and Karen are in the diner during "The H Word," there is one shot where the camera looks face on at Karen and over her right shoulder at the back of the diner you can see a bullseye on a piece of art right next to her head. In the comics, Karen was killed by Bullseye.
- Matt's confessional with Father Lantom in "The H Word" takes the broadstrokes of a confessional in the comic Elektra Lives Again.
- Karen begins bonding with Trish while they're holed up in the precinct. Trish is a radio talk show host, and that's actually a job that Karen held for a time in the comics, under the name "Paige Angel".
- Matt's introductory court scene is lifted from the Underboss arc of Brian Michael Bendis's run in the comics. That arc starts with Matt legally obliterating a company that was recklessly endangering childrens lives, and winning massive punitive damages for his clients, just like the case we see Matt wrapping up here.
- Frank Millers run covered Elektras death and implied resurrection, but her actual return came about in Chichesters Fall From Grace arc. While the details are completely different, there are a few surface-level similarities that may suggest some level of influence on the show. In both stories, Elektra comes back changed (in Fall from Grace for the better, in the Netflix-verse for the worse). She and Matt share some intimate moments of bonding in which they reaffirm their love for each other in this new reality. And then, at the end of the story arc, Matt dies. In the comics, Elektra is aware that his death isnt real, but it's ambiguous whether the same is the case in the show.
- The Psalm numbers visible during Karen's vigil for Matt at the end, 142 and 143, add up to 285, the issue of the comics in which Bullseye impersonated Daredevil. It becomes foreshadowing for when that exact scenario happens in Daredevil season 3.
Mythology Gag / The Defenders (2017)