"The Reaper" is the 20th episode of Season 4, and the 68th overall. It originally aired on June 27, 2013.
With three days left, teams are trying new things. Troy ignores doctor's orders and brings his crew to a chunk of swamp inaccessible by boat. So by taking quads, they are able to get 9 large gators, leaving 36 tags left for two days. Meanwhile, Liz and Kristi hunt on shore by truck, but have trouble pulling the massive gators out. They are able to get a good haul for the day.
In Texas, T-Roy and Bigfoot hunt a gator that has been eating farmer's calves. The gator, called Reaper, proves difficult to catch, but he is caught. Meanwhile, Glenn, TK, and their friends start to work on the house-boat that Mitchell was working on when he passed away. They are able to put the frame up on Mitchell's dream house in a single day, faster then Glenn could have done it.