Pops recounts how his grandfather Drex (Anthony Anderson) created a new form of music. Ruby (Jenifer Lewis) refuses to believe that Pops' Pops' Pops invented jazz, but Pops insists he just innovated "beats by Drex." From the Season 1 Finale of black-ish, "Pops' Pops' Pops." ABC WEDNESDAYS 9:30|8:30c.