‘UFC 146 Primetime’ Episode 3 Airs Friday at 11 p.m. Eastern on FX

Frank Mir (James Law/HeavyMMA)

Last of three-part special airs after TUF Live

The UFC’s “Primetime” series concludes Friday with the third and final episode of a three-part special for UFC 146: Dos Santos vs. Mir.

UFC heavyweight champion Junior dos Santos and challenger and former champion Frank Mir are the focus of a three-part “UFC Primetime” special for their main event. The two fight Saturday at UFC 146 at the MGM Grand Garden Arena in Las Vegas.

Tonight’s final episode will air at 11 p.m. Eastern, immediately following “The Ultimate Fighter LIVE” on FX. Additionally, replays of the episode air on Fuel TV as well as select Fox Sports affiliates across the country.

The path to the UFC 146 main event has been an interesting one, to say the least. Dos Santos, who won the belt from Cain Velasquez in November, was expected to meet former Strikeforce heavyweight champion Alistair Overeem in his first defense. Overeem beat former champion Brock Lesnar in December in a top contenders bout to earn a shot at the title.

But at a March news conference to promote the all-heavyweights main card of UFC 146, Overeem and the five other fighters on the dais at the event were given surprise random drug tests by the Nevada State Athletic Commission. Overeem was the only one of the six who didn’t pass, getting red-flagged for an elevated testosterone-to-epitestosterone level that reportedly was 14:1. The NSAC standard is 6:1. Overeem was scheduled for a hearing with the NSAC on April 24 where the commission would decide whether or not to grant him a license to fight, despite the elevated levels – pending his explanation.

But on the Friday before his hearing, UFC president Dana White announced that Overeem had been pulled from the main event and Mir would get the title shot. Mir had been scheduled for a co-main event top contenders fight with Velasquez on the same card. So dos Santos went from preparing for a standup specialist in Overeem, perhaps the heavyweight division’s best striker, to preparing for arguably the best ground fighter in heavyweight history in Mir. And Mir went from a three-round fight to a five-round title fight with a month’s notice.

Mir was the UFC heavyweight champion after a submission win over Tim Sylvia at UFC 48. But he vacated his title when he couldn’t defend it following a bad motorcycle accident. Years later, at UFC 92, he won the interim heavyweight title, but lost a unification bout to Lesnar at UFC 100. So he is no stranger to heavyweight title fights.

You can watch the first and second episodes of “UFC 146 Primetime” commercial-free via the players below: