When Adam is informed that Do the Right Thing stars Danny Aiello Danny Aiello, he references Danny as also being in Woody Allen Woody Allen's Broadway Danny Rose. Aiello did not appear in that Woody Allen film, though he would go on to costar in Allen's later films The Purple Rose of Cairo (1985) Purple Rose of Cairo and Radio Days (1987) Radio Days. The star of Broadway Danny Rose was Nick Apollo Forte Nick Apollo Forte, who was similar in appearance to Aiello.
The Berlin Wall came down 9th November 1989 yet when Geoff is selling fake parts everyone is dressed as if it's summer unless it's 1990 a year later.
Sophie's Choice is one of the movies in the box of "harsh realities" Bev and Murray have been shielding Adam from and Adam then watches it for the first time. But back in season 7 episode 13 Adam roots for Meryl Streep to win the Oscar for Sophie's Choice indicating that he already knows of and has seen this movie.