Season 21 aired between 20 Jan 2015 and 22 Dec 2015, 12 episodes.
Episodes
E01
Monsters No More / Mr. Sunday Night / The Toast of Beijing / Urban Renewal
20 Jan 2015
E02
Death on Everest / Hooked / Wonder Woman
24 Feb 2015
E03
The Wreckage / Scarred
24 Mar 2015
E04
Captain Comeback / Man in the Middle / Big League Chew
21 Apr 2015
E05
In Harm’s Way / Erik Weihenmayer / Ronda Rousey
19 May 2015
E06
Girls Interrupted / Vision Quest / The Price of Glory
23 Jun 2015
E07
Bike Wars / Trophy Culture / Uncaged
21 Jul 2015
E08
Ryan's Song / Brother's Keeper / 4th and Go
18 Aug 2015
E09
Jerry's World / A Wing And A Prayer / Blurred Lines
22 Sep 2015
E10
Another Shot / Fields of Vision / Lasting Impact
20 Oct 2015
E11
The Killing Fields / Magic Mike
24 Nov 2015
E12
2015 Holiday Roundtable
22 Dec 2015