The Leech

Classic era science fiction about a very odd visitor from outer space.
 

Cast List
Professor Michaels -
     Grant Baciocco (Radio Adventures of Dr. Floyd)
Frank Connors -
     Bryan Hendrickson
Mrs. Jones - Kimberly Poole  
     (Warp'd Space)
Sheriff Flynn - Glen Hallstrom
General O'Donnell - Chuck Burke
Allenson, scientist - Cary Ayers
Moriarty, physicist -
     Eleiece Krawiec
Brigadier-General -
     H. Keith Lyons
Driver - Cary Ayers
Soldier1 - John Carroll
Soldier2 - Lothar Tuppan
Pilot - Mark Olson
The Leech - Suzanne Dunn, Will Watt, James Sedgwick, Julie Hoverson

Many thanks to Project Gutenberg and Librivox for curating these classic stories.
[Link to The Leech in short sci fi collection 24 at Librivox]