Marshall is Curtis’ father. He came to town as a mysterious figure because years ago, he had left Curtis and his mom, and they thought he had died of a heart attack. It turned out that he was arrested during a protest and then put into a mental hospital. He was misdiagnosed with schizophrenia, which is why he stayed away all these years. Marshall is a professional jazz clarinet player.
Marshall is now close with Curtis, Stella, TJ and Portia. He briefly dated Nurse Epiphany Johnson.