A backwoods game warden and a local doctor discover that giant leeches are responsible for disappearances and deaths in a local swamp, but the local police don't believe them.
Ken Clark
as Steve Benton
Yvette Vickers
as Liz Walker
Jan Shepard
as Nan Greyson
Michael Emmet
as Cal Moulton
Tyler McVey
as Doc Greyson
Bruno VeSota
as Dave Walker
Gene Roth
as Sheriff Kovis
Dan White
as Porky Reed
George Cisar
as Lem Sawyer
Guy Buccola
as Giant Leech (uncredited)
Joseph Hamilton
as Sam Peters (uncredited)
Walter Kelley
as Mike (uncredited)
