Fourth quarter
Three plays later, on the first play of the fourth quarter, Morrall threw an interception to Howley in the end zone to preserve the Cowboys' 13-6 lead.[12]

After forcing the Cowboys to punt, the Colts regained the ball on their own 18-yard line, still trailing 13-6. Aided by a pass interference call and a 23-yard completion, the Colts advanced into Dallas territory. The Colts then att… Moreempted to fool the Cowboys with a flea-flicker play,[6][7][13] resulting in one of the oddest plays in Super Bowl history. Running back Sam Havrilak took a handoff and ran right, intending to lateral the ball back to Morrall, but Dallas lineman Jethro Pugh stormed into the backfield and prevented him from doing so. Havrilak then threw a pass intended for Mackey, but it was caught instead by Hinton, who promptly took off for the end zone. However, as Hinton raced toward a touchdown, Cowboys defensive back Cornell Green stripped him from behind at the 11-yard line. The loose ball bounced wildly in the field of play but somehow evaded recovery. It was eventually pushed 20 yards through the back of the end zone for a touchback, thus returning the ball to the Cowboys at their 20-yard line.

Three plays after the turnover the Cowboys returned the favor. Morton threw a pass that was intercepted by Colts safety Rick Volk, who returned the ball 30 yards to the Cowboys' 3-yard line (Morrall later referred to play as the play of the game).[7] Two plays later, the Colts scored on a 2-yard touchdown run by Nowatzke. O'Brien's extra point sailed through the uprights to tie the game at 13–13. (O'Brien says he was much calmer and more confident on this extra point than on the first one, which was blocked.)

The next two possessions ended in traded punts, with the Cowboys eventually taking over in excellent field position at the Colts 48-yard line with less than 2 minutes left in the game.

On the second play of this potential game-winning drive, Dallas committed a 15-yard holding penalty (its second offensive holding of the game) on the 42-yard line, which was a spot foul, pushing the team all the way back to its own 27-yard line (the NFL did not reduce the penalty for offensive holding to 10 yards until 1974).[14] Then, on second down and 35, Morton threw a pass that slipped through the hands of running back Dan Reeves and bounced for an interception into the arms of linebacker Mike Curtis, who then returned the ball 13 yards to the Cowboys' 28-yard line.

Two plays later, with 9 seconds left in the game, O'Brien kicked the go ahead 32-yard field goal, giving Baltimore a 16–13 lead.[15] O'Brien says he was "on automatic" and was so calm and concentrating so hard that he didn't hear anything and saw only the ball.[6] In an enduring image from Super Bowl V, after O'Brien's game-winning field goal Bob Lilly took off his helmet and hurled it through the air in disgust.

The Cowboys received the ball again on their 40-yard line with a few seconds remaining after O'Brien's ensuing squib kick, but Morton's pass to Garrison was intercepted by Logan at the Baltimore 29-yard line, and time expired. Less