Coming off their comeback divisional road win over the Texans, the Colts went home for a Week 6 duel with the Baltimore Ravens.  In the first quarter, Indianapolis got a fast start as QB Peyton Manning completed a 67-yard TD pass to WR Marvin Harrison and a 22-yard TD pass to WR Reggie Wayne, while kicker Adam Vinatieri got a 37-yard field goal.  In the second quarter, the Colts continued their dominating start as Manning completed a 5-yard TD pass to Harrison.  In the third quarter, Indianapolis continued its victory march as RB Dominic Rhodes got a 1-yard TD run.  The Ravens would get their only score of the game as kicker Matt Stover nailed a 37-yard field goal. With the win, not only did the Colts improve to 3-2, but they finally got their first win in their new stadium.
How many first quarter touchdown passes did Peyton Manning throw?
2