Whenever Mel Brooks wanted to get a rise out of wife Anne Bancroft during their joint talk-show appearances of the 1970s, Brooks would bring up the subject of Gorilla at Large. Easily the low point of Ms. Bancroft's movie career, the film is good for a few chuckles if one's in the proper mood. The story is set in an amusement park, where the star attractions include trapeze artist Cameron Mitchell and a huge, vicious gorilla. When a series of murders take place, Mitchell is one of the prime suspects; another is Bancroft's husband Raymond Burr, who owns the big ape. The revelation of the actual killer is mildly surprising, not to mention thoroughly unbelievable. Gorilla at Large was filmed in 3D, resulting in a reasonably exciting "thrill" sequence atop a roller coaster.
~ Hal Erickson, All Movie Guide