Twice during Thanksgiving dinner hosted by Jack and Rebecca, the Cowboys game is shown with a permanent score bug. This dinner happened pre-1980, but permanent score bugs were not used by TV networks until the 1990s.
At two of the Thanksgiving dinners, the Cowboys are shown playing the Dolphins. The announcer can be heard mentioning Dan Marino in one of the clips and he is shown in the other. The one in which he is mentioned (1999) is correct. The other was 1977 and while the Cowboys and Dolphins did play that Thanksgiving, Marino was in high school at the time. Apparently footage from the same game was used in both scenes as Marino only played in one Thanksgiving game (against the Cowboys in 1999). When the two teams met Thanksgiving 1993, Marino was sidelined with a torn Achilles.