The win came as a big relief for the Irish (12-10, 3-6), who won for just the second time in their last eight games.
"Finally, we're getting out of here with a win," Atkins said.
Both teams squandered chances to win in regulation. The Eagles had a chance to open a three-point lead with 7 seconds left, but Hanlan, who failed to score in double figures for just the second time this season, missed the front end of a one-and-one, ending a streak of 13 straight made free throws by the Eagles. Atkins then drove the length of the court and appeared to lose control of the ball, but Hanlan was called for the foul with 0.7 seconds left. Atkins tied the game with his first free, throw, but missed the second.
Atkins scored 16 of his 24 points in the second half and overtime to lead the Irish to the victory. Pat Connaughton added 17 points and nine rebounds and Zach Auguste and V.J. Beachem finished with 10. Beachem scored all his points after intermission, including a 3-pointer early in overtime that gave the Irish their first lead since the first half, as Irish reserves scored 15 points in the second half after being held scoreless in the first.
Lonnie Jackson added 15 points for the Eagles and Joe Rahon added 11. Alex Dragicevich, who played for Notre Dame before transferring following his sophomore season in 2012 because of a lack of playing time, made his first start for BC since Dec. 28. He was booed by the Notre Dame student section every time he touched the ball, and when he finally hit a 3-pointer late in the first half, his teammates on the bench stood up and cheered.
Dragicevich, who is from Northbrook, Ill., said it didn't bother him.
"It was not too much of an emotional experience for me," he said.