Trivia: Just after Diamondback knocks out Misty, Luke walks out and we see a dumpster that reads "Timely Trash." A reference to Timely comics, the predecessor to Marvel.
Trivia: The yellow shirt, the green pants and the bracelets are the original outfit from Hero for hire Vol. 1 #1 of 1972.
Trivia: A girl at the bar asks for six bottles of Ace of Spades - that's a nickname used by Luke in the comics.
Trivia: Luke escapes from the prison punching the wall in a similar way he did in the comics.
Trivia: The Hammer brand is a reference to Justin Hammer, from Iron Man 2.
Trivia: One of the gangsters says "that John Blaze shit". While sounding like a reference to Ghost Rider, it's only indirectly so. It's actually a nickname for Method Man, who features in another episode, but he took the inspiration for the name from "Johnny Blaze", ie. Ghost Rider.
Trivia: The guy Bobby brings in to get Luke a suit is the real life Dapper Dan. Dapper Dan has been a Harlem icon since the 80's. And the Mike Tyson / Mitch Green story that is brought up was a real incident that occurred at Dapper Dan's store in 1988.