1980: With the Detroit Lions and Chicago Bears tied 17–17 at the end of regulation, the game went to overtime, the first Thanksgiving game to do so (overtime was not added to the NFL regular season until 1974), and the first overtime game at the Silverdome.
1980: With the Detroit Lions and Chicago Bears tied 17–17 at the end of regulation, the game went to extra time, which was not added to the NFL regular season until 1974, and it was the first overtime game played at the Silverdome.