And the black people are (drumroll, please):

Season 4, Episode 1: Carla.

Season 4, Episode 2: Carla and a bartender at the Christmas party.

Season 4, Episode 3: A man and a woman who were in the audience at the club where Don and Lane saw the comedian.

Season 4, Episode 4: A man waxing the floors at Sterling Cooper Draper Price, and three guests at the loft party.

Season 4, Episode 5: Carla (with Sally in the child psychiatrist's office).

Season 4, Episode 6: An elevator operator in the last scene.

Season 4, Episode 7: No black people.

Season 4, Episode 8: Two people walking down the street past Don Draper. Possibly the person who gave Betty Draper her purse under the bathroom stall, but that's debatable, so we're not counting it.

Season 4, Episode 9: The man who mugs Roger and Joan on an New York street.

Season 4, Episode 10: Toni, the Playboy Bunny who is Lane's girlfriend.

Season 4, Episode 11: None. We guess after the literal beating Lane took over his relationship with Toni, they needed a breather.

Season 4, Episode 12: We're on a roll...none.

Season 4, Episode 13: Poor Carla, who was fired; a moving man; and model Caroline Jones, whose moniker left us wondering if she was named after the advertising icon Caroline R. Jones, one of the few black women working in a leadership role on Madison Avenue during the 1960s.