Junior dos Santos will earn the chance to regain the UFC heavyweight title at UFC 166 when he faces off with champ Cain Velasquez for a third time.

Heading into the match, take a look at the lives of these two fighters with “UFC Primetime,” a pre-fight documentary series that focuses on Velasquez and dos Santos.

And while you’re at it, check out the full card for UFC 166 below.

UFC 166: Velasquez vs. dos Santos 3
Oct. 19, 2013
Toyota Center
Houston

Main Card:
Cain Velasquez (12-1) vs. Junior dos Santos (16-2)
Daniel Cormier (12-0) vs. Roy Nelson (19-8)
Gilbert Melendez (21-3) vs. Diego Sanchez (24-5)
Gabriel Gonzaga (15-7) vs. Shawn Jordan (15-4)
John Dodson (15-6) vs. Darrell Montague (13-2)

Prelims: 
Tim Boetsch (16-6) vs. CB Dolloway (13-4)
Nate Marquardt (32-12-2) vs. Hector Lombard (32-4-1)
Sarah Kaufman (15-2) vs. Jessica Eye (10-1)
George Sotiropoulos (14-5) vs. KJ Noons (11-7)

Prelims on GRACIEMAG.com:
TJ Waldburger (16-7) vs. Adlan Amagov (12-2-1)
Tony Ferguson (13-3) vs. Mike Rio (9-2)
Charles Oliveira (16-4-1) vs. Jeremy Larsen (8-4)
Dustin Pague (11-8) vs. Kyoji Horiguchi (11-1)