CBS is doubling down on Big Brother, while the James Patterson adaptation is getting a third-season. Earlier today CBS confirmed a third season renewal for the hit series ZOO, which is set to return in the summer of 2017. Currently in its second season, ZOO is this summer’s second most-watched original scripted broadcast. Fans of the show can catch the two-hour second season finale this fall, that event is set to air on Tuesday, Sept. 6 (9:00-11:00 PM, ET/PT).

The show is based on the #1 bestseller by James Patterson, ZOO is a global thriller about a wave of violent animal attacks against humans across the planet. ZOO is produced by CBS Television Studios. The series is distributed domestically by CBS Television Distribution and worldwide by CBS Studios International. Jeff Pinkner, Josh Appelbaum, Andre Nemec, Scott Rosenberg, Michael Katleman, James Mangold, Cathy Konrad, James Patterson, Bill Robinson, Leopoldo Gout and Steve Bowen are executive producers. If you missed some of the first season, ZOO is now available on Netflix in the U.S. and season two will be available Sept. 14, 2016.

CBS has also renewed the summer reality hit BIG BROTHER for its 19th and 20th seasons. Those shows will return in the summer of 2017 and 2018. The series is hosted by Julie Chen. Since it premiered on CBS in the summer of 2000, BIG BROTHER has consistently finished among the summer’s top-rated series in young demographics. Summer-to-date, all three weekly broadcasts rank among the top five programs in A18-34, and the top 10 programs in A18-49 and A25-54.

In addition, since its premiere to date, this summer’s BIG BROTHER is the most social series on TV, according to Nielsen Social, and total streams across digital platforms are up 33% over last year.

The current season of BIG BROTHER airs Sundays and Wednesdays (8:00-9:00 PM, ET/PT) and Thursdays (9:00-10:00 PM, live ET/delayed PT), featuring the live eviction show hosted by Julie Chen, on the CBS Television Network.

BIG BROTHER follows a group of people living together in a house outfitted with 87 HD cameras – seven more than last year – and more than 100 microphones, recording their every move 24 hours a day. Each week someone will be voted out of the house, with the last remaining Houseguest receiving the grand prize of $500,000. BIG BROTHER is produced by Emmy Award-winning producer Allison Grodner and Rich Meehan for Fly on the Wall Entertainment, in association with Endemol Shine North America.