Editor's note: This episode replaces previously scheduled programing.

JAMES WOLK, KRISTEN CONNOLLY, BILLY BURKE, NONSO ANOZIE AND NORA ARNEZEDER STAR IN A ENCORE PRESENTATION OF THE SERIES PREMIERE OF "ZOO," A NEW DRAMA SERIES BASED ON JAMES PATTERSON'S #1 BESTSELLING NOVEL, SUNDAY, JULY 5

"First Blood" - Jackson Oz, an American ex-pat safari guide living in Africa, discovers a link between strange animal attacks on people occurring around the world and his late father's controversial theories about an impending threat to the human race. Meanwhile, journalist Jamie Campbell and veterinary pathologist Mitch Morgan team up to investigate similar abnormal animal behavior in Los Angeles, on an encore presentation of the summer series premiere of ZOO, Sunday, July 5 (9:00-10:00 PM, ET/PT), on the CBS Television Network. (Originally broadcast 6/30/15.)

ZOO, based on the #1 bestselling novel by James Patterson, is a global thriller about a wave of violent animal attacks against humans sweeping the planet. Jackson Oz is a young renegade American zoologist who spends his days running safaris in the wilds of Africa with his best friend Abraham, who has a deep understanding of wildlife. Shortly after the attacks begin, Oz begins to see a link between the strange animal attacks and his late father's controversial theories about impending threats to the human race. In Los Angeles, news reporter Jamie Campbell is intent on being the first to break the story behind the mysterious animal behavior, and seeks the expertise of Mitch Morgan, an off-kilter veterinarian, who prefers the company of animals over people. Nora Arnezeder stars as Chloe Tousignant, a French investigator Oz meets in Africa. As the assaults occurring worldwide become more cunning, coordinated and ferocious, Oz and the others are thrust into the race to unlock the mystery of the pandemic before there's no place left for people to hide.

REGULAR CAST:

James Wolk (Jackson Oz)
Kristen Connolly (Jamie Campbell)
Billy Burke (Mitch Morgan)
Nonso Anozie (Abraham Kenyatta)
Nora Arnezeder (Chloe Tousignant)

GUEST CAST:

Ken Olin (Professor Robert Oz)
Reid Scott (Ethan Boyd)
Tamara Tunie (Brenda Montgomery)
Wayne Pere (Lawrence Fremer)
Brian Tee (Philip Weber)
Isaac White (Daniel)
Shane Jacobsen (Rudy)
Brandon Scott Stacy (Blaine)
Philip Fornah (Guide)
Garrett Kruithof (Australian Dude)
Victor Ramsey (Kenyan Policeman)
Jay S. Potter (Newscaster)
Stella Allen (Fremer's Daughter)
Henri Lubatti (Gaspard Alves)

WRITTEN BY: Executive Producers Josh Appelbaum, André Nemec, Jeff Pinkner and Scott Rosenberg

DIRECTED BY: Brad Anderson