The women portrayed on the Family First clinic entrance corridor wall are Sojourner Truth (abolitionist and women's rights activist who was born a slave and escaped), Mary McLeod Bethune (educator, stateswoman, philanthropist, and civil rights activist best known for starting a private school for African-American students in Daytona Beach, FL, and being part of FDR's "Black Cabinet" as a personal advisor to the President), Ida B. Wells (investigative journalist, educator, an early leader in the Civil Rights Movement, and one of the founders of NAACP), Bessie Coleman (the first African-American and the first Native-American woman to hold an aircraft pilot license), Zora Neale Hurston (anthropologist and literary author), and Maya Angelou (poet, singer, memoirist, and civil rights activist).
Right before Foggy Nelson calls him at the barber shop, Luke Cage is browsing four hardcover books. The first is "Between the World and Me" by Ta-Nehisi Coates, the second is "The Force" by Don Winslow, and the third is "The Underground Railroad" by Colson Whitehead. The fourth book can't be clearly seen.
"All Souled Out" is a song from the album 'All Souled Out' of the hip-pop duo Pete Rock & C.L. Smooth.
When Misty Knight gets a munitions shell out of the police locker, it says Hammer Advanced Weapon Systems on it. Justin Hammer who owns Hammer Industries, is Tony Stark's rival in Iron Man 2 (2010).