The Biggest Loser: 13x4
Week 4
The teams compete for exclusive use of the gym during a battering-ram challenge. Bob and Dolvett, meanwhile, try to get through to contestants they feel aren’t putting in enough effort to shed pounds.
13 - 1Week 1 Jan. 03, 2012
13 - 2Week 2 Jan. 10, 2012
13 - 3Week 3 Jan. 17, 2012
13 - 4Week 4 Jan. 24, 2012
13 - 5Week 5 Jan. 31, 2012
13 - 6Week 6 Feb. 07, 2012
13 - 7Week 7 Feb. 14, 2012
13 - 8Week 8 Feb. 21, 2012
13 - 9Week 9 Feb. 28, 2012
13 - 10Week 10 Mar. 06, 2012
13 - 11Week 11 Mar. 13, 2012
13 - 12Week 12 Mar. 20, 2012
13 - 13Week 13 Mar. 27, 2012
13 - 14Week 14 Apr. 03, 2012
13 - 15Week 15 Apr. 10, 2012
13 - 16Week 16 Apr. 17, 2012
13 - 17Week 17 Apr. 24, 2012
13 - 18Week 18 - Finale May. 01, 2012