The Green Bay Packers defense allowed only one scoring drive, and almost had their second shutout of the season. They took WR Calvin Johnson out of the game (one reception for 44 yards, but the other seven passes thrown to him were all incomplete) and there isn't much to the Lions offense thereafter. There was really only one exception to a dominant defensive performance.
With 14:32 to go in the fourth quarter, the Lions ran a 12 play, 80 yard drive, and scored a touchdown. They were 2 for 2 on 3rd down efficiency, and QB Drew Stanton was 5 of 6 for 49 yards and 1 touchdown. The Lions got everything together for one drive, and that was all they needed.
For the rest of the game, the Lions were 1 for 13 on 3rd down, and Stanton was 5 of 16 for 68 yards and 2 interceptions. They were able to run the ball, but the Packers were giving them those rushing plays. Dom Capers kept the defense in a nickel package almost the entire game, and was often playing with only two defensive lineman. The Lions have been running the ball better lately, and that defensive scheme was designed to let them run. But eventually Stanton would have to throw the ball to keep drives alive, and that's when they stopped them.