Coming off their bye week, the Lions played a Week 5 Black and Blue Division duel at home with the Chicago Bears.  In the first quarter, Detroit trailed early as Bears kicker Robbie Gould got a 37-yard field goal.  In the second quarter, the Lions continued to trail as QB Kyle Orton completed a 9-yard TD pass to RB Matt Forte and a 12-yard TD pass to WR/KR Devin Hester.  In the third quarter, Chicago continued its domination as Fort&#233; got a 1-yard TD run, and CB Charles Tillman returned an interception 26 yards for a touchdown. Afterwards, Detroit got its only score of the game as rookie RB Kevin Smith scored on a 12-yard TD run.  In the fourth quarter, the Bears sealed the win when Gould nailed a 45-yard field goal.. How many defensive touchdowns were scored in the game?