UFC 165 is the first UFC pay-per-view to feature two title fights since UFC 152, which also took place in Toronto. The main event featured a UFC Light Heavyweight Championship bout between the current champion Jon Jones and Alexander Gustafsson. Co-featured on the card was a rescheduled Interim Bantamweight Championship bout between the current champion Renan Barão, and former WEC Bantamweight Champion and top contender Eddie Wineland. The pairing was first planned as the headliner at UFC 161, but was removed from that event after Barão injured his foot. Mark Bocek was expected to face Michel Prazeres at this event. However, Bocek pulled out due to an injury and was replaced by UFC newcomer Jesse Ronson. Ivan Menjivar was expected to face Norifumi Yamamoto at the event. However, Yamamoto was removed from the bout and was replaced by Wilson Reis.
A dramatic thriller based on the incredible true David vs. Goliath story of American immigrant Dr. Bennet Omalu, the brilliant forensic neuropathologist who made the first discovery of CTE, a football-related brain trauma, in a pro player and fought for the truth to be known.
After discovering they are all dating the same same guy, three popular students from different cliques band together for revenge, so they enlist the help of a new gal in town and conspire to break the jerk's heart, while destroying his reputation.
When the White House (Secret Service Code: "Olympus") is captured by a terrorist mastermind and the President is kidnapped, disgraced former Presidential guard Mike Banning finds himself trapped within the building.