Grizzly

Kelly

Don

Scott

Allison

Kittridge

Dr.Hallitt

Corwin

Tom

Gail (as Vicki Johnson)

June (as Catherine Rickman)

Margaret

Reporter

Pat

Mike

George

Mother

Lone Hunter (as David Holt)

Bobby

Sally

Harry

Ranger (uncredited)

Man Being Interviewed (uncredited)

The height and weight of the Grizzly Bear according to the film's publicity was eighteen feet tall and weighed two thousand pounds. However, the height of the grizzly bear in the film's storyline was around three feet shorter being said to be at or at least fifteen feet thereby somewhat making the movie's promotional blurbs an exaggeration. Moreover, the height of the grizzly bear called "Teddy" that portrayed the ferocious beast in the film was only eleven feet tall, seven feet less than its publicized eighteen feet.

The zoological genus name given for the grizzly bear in the film's story was a "pleistocene arctodus ursos horribilis" but this nomenclature was fictional.

Warner Bros. originally expressed interest in financing the film and was reportedly furious that producer Edward L. Montoro and Film Ventures International (FVI) had taken the project. Warner Bros. offered to put up a larger budget. Ironically, the year before this the studio sued Montoro and FVI over copyright infringement for the successful theatrical release of The Exorcist (1973)" ripoff Beyond the Door (1974).

Scotty describes the killer bear as cannibalistic after it attacks the bear cub but the cub is a black bear, a species distinct from the grizzly bear they're tracking.

Camera shadows visible in some scenes.

Don says he will never kill another thing again. But through the entire film he is trying to kill a grizzly bear.

Charley: Kelly, you're a maverick. We don't have room for mavericks!

Ranger Michael Kelly: Bears don't eat people!

Don: Well let me tell you a little story boy. A long time ago their was a tribe of Indians up here in these woods. They were all laying down in these parts... or something I can't remember. Any way these herd of grizzlies smelt them out. They came in an they ate them. They thorn them all up. Little children, sick ones everybody! Their were few braves to go out on the hunt. They came back and them grizzlies turned on them! So their you got yourself a little situation. A whole herd of man-eating grizzlies. Just running around tearing up them Indians!