After wining the $500,000 grand prize, Ian Terry (left) poses next to runner-up, Dan Gheesling, on the BIG BROTHER Finale, Wednesday, September 20. Credit: Sonja Flemming/CBS

Revenge of the nerd indeed!

Twenty-one-year-old Tulane University engineering student Ian Terry survived 75 days in the Big Brother house, emerging victorious over Dan Gheesling Wednesday to nab the CBS show's $500,000 prize.

Season 14's finale found Terry battling Gheesling -- who returned to the game along with three other show alumni to coach the newbie players this season -- and Danielle Murphree for the chance to become the final Head of Household. When Terry clinched that title, he evicted Murphree and decided to bring Gheesling to the final two, where a jury of their peers would decide which contestant was most deserving of the top prize. (Gheesling was the first Houseguest ever to win Big Brother by a unanimous vote in season 10.)

Terry's decision to bring Gheesling to the final two was a smart one, because the former winner's conniving gameplay led the 7-member jury to resent him. Gheesling's mentee Murphree was the only player to vote in his favor, while Shane Meaney, Jenn Arroyo, Joe Arvin, Frank Eudy, Britney Haynes and Ashley Iocco cast votes for Terry.

"This is easily the best moment of my entire life," Terry, a member of the show's "quack pack" alliance, said after host Julie Chen named him the winner.

Terry wasn't the only Big Brother contestant to walk away a winner Wednesday. Eudy was named America's Player and received $25,000.

Tell Us: Did Ian deserve to win Big Brother?