CBS renewed the series for a third season in August 2016, which aired between June 29 and September 21, 2017. On October 23, 2017, CBS announced that the series was canceled after three seasons. Further information: Violent animal attacks upon humans are occurring all over the world. Jackson Oz, an American and his Kenyan friend, Abraham, a safari guide, as well as a Los Angeles reporter, a quirky veterinary pathologist, and a French intelligence agent all seek to investigate the mysterious pandemic as the attacks become more coordinated and ferocious. The series premiered on June 30, 2015, on. On October 2, 2015, Zoo was renewed by CBS for a second season, which premiered on June 28, 2016. On August 10, 2016, CBS renewed the series for a third season, which premiered on June 29, 2017. Casting James Wolk was the first to be cast, in November 2014, followed later the same month by and Nonso Anozie. The main cast was rounded out in January 2015, with and. In March, was cast in a recurring role. In March, 2016, Josh Salatin and were added to the cast as series regulars in the second season. In April, was cast in a recurring role. In December, 2016, Gracie Dzienny, who guest-starred in the second-season finale, was promoted to series regular for the third season. In January, 2017, was cast in a recurring role. In February, , Hilary Jardine, and were cast in recurring roles. Filming The series started filming in in January 2015. Production for the second season began filming in February 2016 in and around , ,. The third season started filming in mid-January 2017, also in and around ,. Retrieved October 23, 2017. Retrieved September 1, 2015. Retrieved June 30, 2015. TV by the Numbers. Retrieved February 26, 2015. Retrieved November 6, 2015. CBS announced today the second season renewal of Zoo for broadcast during summer 2016.. Retrieved March 26, 2016. TV by the Numbers. Retrieved August 10, 2016. Retrieved March 23, 2017. Retrieved November 12, 2014. Retrieved November 24, 2014. Retrieved November 27, 2014. Retrieved January 30, 2015. Retrieved March 3, 2015. Retrieved March 11, 2015. Retrieved March 9, 2016. Retrieved July 20, 2016. Retrieved March 17, 2017. Retrieved March 23, 2017. Retrieved March 23, 2017. Retrieved March 23, 2017. Retrieved February 17, 2015. Retrieved July 13, 2016. Retrieved July 10, 2015. Retrieved July 10, 2015. Retrieved November 27, 2015.