Season 2 of this musical docudrama opens with the premiere "1975," a year that finds "Soul Train" swiftly growing in popularity with TV audiences. That success proves double-edged, however, since it leaves Don (Sinqua Walls) struggling to deal with an unwelcome new level of stress. Meanwhile, Gerald (Jason Dirden) is blackmailed by a former accomplice who now works for the mob. James Devoti also stars.