When Murdock and Foggy are renting the office space, the realtor says that the price has gone down since "the incident". This is referring to the events of The Avengers (2012).
Turk Barrett was a reoccurring character in the original comics, who was a petty criminal and usually Daredevil's unwilling informant.
The last name of the crooked police officer, Farnum, is the same last name as the Masked Marauder. The Marauder was an early Daredevil villain.
First appearance of Leland Owlsley, in the comics known as the Owl; a recurring foe of Daredevil during the 1960s and 1970s.
Drew Goddard was initially hired as the showrunner, but had to withdraw because of his directing commitment to The Sinister Six, another Marvel property. Goddard will remain on as a consultant while Steven S. DeKnight was hired as a replacement.