This television episode refers to:
April 30, 1975 - May 15, 1979
Doug tells the guys that Carrie is working late, because her law firm won a big case. Danny sings "Porno" music, after teasing Doug that Carrie is working late with her boss. Spence asks what he is singing, saying it sounds more like the theme to Starsky and Hutch, rather than Porno music.