Johnson passed for 381 yards and two touchdowns to pace Montana (7-2, 4-2 Big Sky Conference), while Jordan Canada rushed for four touchdowns and 78 yards on 17 carries. Canada's 1-yard plunge with 3:38 left in the game seemed to set the Grizzlies up for the win.
Safron ended the day 41 of 58 for 412 yards and 4 TDs, and ran for 93 yards and 2 TDs.
In overtime, the Hornets' drive stalled at Montana's 8-yard line, where Brad Cornish hit for a 25-yard field goal. On the Grizzlies' first play in the extra session, Johnson found Henderson for the game-winner.
The College GameDay crew discusses the possibility of the Big Ten being left out of the College Football Playoff.
Alabama head coach Nick Saban joins Kaylee Hartung to discuss how his team prepares for Auburn.
Oklahoma coach Bob Stoops says QB Baker Mayfield hasn't been hindered at all by his concussion and is ready to play against Oklahoma State.
Lee Corso and Kirk Herbstreit agree LSU would be making a mistake by firing Les Miles and the school should give him a chance to turn things around.
David Pollack and Kirk Herbstreit explain what has to happen for Alabama to lose to Auburn.
Alabama coach Nick Saban explains on College GameDay what the Crimson Tide have to do to make sure the season doesn't end in disappointment.