A college student becomes lab assistant to a scientist who is working on a serum that can transform humans into snakes.


(screenplay), (story) (as Dan Striepeke)

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1 nomination. See more awards »
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Cast overview, first billed only:
Dr. Carl Stoner
David Blake
Kristina Stoner (as Heather Menzies)
Richard B. Shull ...
Dr. Ken Daniels
Sheriff Dale Hardison
Kitty Stewart
Steve Randall
Ted Grossman ...
Deputy Morgan Bock
Charles Seel ...
Old Man
Ray Ballard ...
Waggish Tourist
Brendan Burns ...
Jock #1
Rick Beckner ...
Jock #2
Jim Drum ...
Hawker #1 (as James Drum)
Ed McCready ...
Hawker #2


David, a college student, is looking for a job. He is hired by Dr. Stoner as a lab assistant for his research and experiments on snakes. David also begins to fall for Stoner's young daughter, Kristina. However, the good doctor has secretly brewed up a serum that can transform any man into a King Cobra snake-and he plans to use it on David. Written by Anonymous

Plot Summary | Add Synopsis


For them there is no esssssscape See more »


Horror | Sci-Fi


PG | See all certifications »

Parents Guide:





Release Date:

July 1973 (USA)  »

Also Known As:

Hissssss  »

Box Office


$1,300,000 (estimated)

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:

(Westrex Recording System)



Aspect Ratio:

1.85 : 1
See  »

Did You Know?


In an amusing example of how times change, the gas station attendant yells at David for pumping his own gas. See more »


[last lines]
Kristina Stoner: No! No! DAVID! No! No! Nooooo! DAAVIIIIID!
See more »

Crazy Credits

A pre-title card opens the film declaring all the reptiles used in the film were real and states "We wish to thank the cast and crew for their courageous efforts while being exposed to extremely hazardous conditions." See more »


Referenced in Argo (2012) See more »

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User Reviews

A mad doctor experimenting with snakes and humans with terrible consequences
15 January 2007 | by See all my reviews

The film deals a mad doctor(Strother Martin),his former helper has disappeared and he asks to University professor(Richard B. Shull)a student. A young man called David (Richard Benedict)looking for employment is hired by the scientific.The doctor works a secrets experiments on snakes.Meanwhile David falls in love with his daughter(Heather Menzies).Then the ¨mad doctor¨ injects him a serum into becoming a King Cobra snake causing a horrible transformation.

The motion picture packs horror,romance,shocks and is quite entertained. In the film appear known actors from the 70s and 80s as Dick Benedict(¨Galactica Battlestar,A Team¨),Strother Martin(Peckimpah's usual player:¨Wild bunch¨),Heather Menzies(Robert Urich wife and little girl actress in ¨Sound of music¨)and Reb Brown(a beefcake who played many hunk men vehicles). John Chambers provides a deliriously imaginative make-up ,he won an Academy Award by the classic ¨Planet of Apes¨and made the sequels among others films(Phantom of the paradise ans Island of Dr. Moreau).Executive producers are Richard D. Zanuck and David Brown ,short time after they produced the successful ¨Jaws¨to Steven Spielberg. The motion picture is well directed by Bernard L. Kowalski who worked with Roger Corman.Slick film aimed at youthful audiences and terror lovers.

6 of 8 people found this review helpful.  Was this review helpful to you?

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