The world is shocked by the appearance of three talking chimpanzees, who arrived mysteriously in a spacecraft. Intrigued by their intelligence, humans use them for research - until the apes attempt to escape.
Released: 1971-05-20
Runtime: 98 minutes
Genre: Action, Science Fiction
Stars: Roddy McDowall, Bradford Dillman, Natalie Trundy, Eric Braeden, William Windom, Sal Mineo, Albert Salmi, Jason Evers, Harry Lauter, M. Emmet Walsh, Roy Glenn, Peter Forster, Norman Burton, William Woodson, Gene Whittington, Donald Elson, Bill Bonds, Army Archerd, James Bacon, Ricardo MontalbanShow all > John Alderman, Jack Berle, Karl Bruck, Sam Chew Jr., Walker Edmiston, Sig Frohlich, James W. Gavin, George Golden, Bob Harks, Linda Harrison, Elizabeth Harrower, Shep Houghton, Joseph La Cava, Ron Pinkard, Janos Prohaska, Tony Regan, Hank Robinson, James B. Sikking, Jack Slate, Arthur Tovey, William Tregoe, Alan Baxter, James Gonzalez, Joe Gray, John Randolph, Tom Lowell, Paul Bradley, Stephen Roberts, Kim Hunter, Robert Nichols, William Beckley