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)

Bill Scully as Search Party Member (uncredited)

Carl Sklover as Search Party Member (uncredited)

Ross Sturlin as Giant Leech (uncredited)

James Miller as Jermey (uncredited)

Killian Miller as Victim (uncredited)