The lamp seen on the desk in Mike's office at Sidwell Investment Group was on Harvey's desk at Pearson Specter in the previous season.
Louis refers to himself and Jeff being "ebony and ivory." Ebony and Ivory is a 1982-released song written by Paul McCartney, and performed by Paul McCartney and Stevie Wonder addressing racial harmony allegorically through the black and white keys of a piano working together with equal value and importance and in concert.
Brendan Hines (Logan Sanders) and Rick Hoffman (Louis Litt) previously worked together on Lie to Me (2009).