Early in the episode Vanessa gives Fisk a rose. In the comics, their son was a crime lord that went by the name The Rose.
During the scene in the boxing gym, there is a poster on the wall that advertises a fight: Parker vs Morales. This is a reference to the secret identity of Spider-Man (Peter Parker) and the new Spider-Man (Miles Morales).
Last episode of the Netflix run of the series. Netflix announced the show's cancellation on 11/29/18. Marvel Studios confirmed at San Diego Comic-Con 2022 that the 4th season will air on Disney+ under the name "Daredevil: Born Again".
While on the phone with Dex, Matt brings up the "little birdies" Dex killed with rocks as a child. In previous episodes Matt listened to tapes of Dex's sessions with Dr. Mercer. In 2 of the sessions Dex confessed to killing animals with rocks, first crows and later a box of kittens.