nobel prize win novelist james hanson ( richard moll a charles moll ) and his wife claire ( faith clift ) who be a doctor and have be suffer from nightmare lately and both set off for a holiday in las vega . while watch some in house entertainment at a casino claire be hypnotise by an english clairvoyant name cecil howard . claire suffer a vivid hallucination about a sadistic s officer name olivier ( robert bristol ) in a nazi concentration camp . after the show claire talk with howard and invite him to supper . soon after she leave howard be kill by what appear to be a red light ( do not ask ) . meanwhile a old jewish man name abraham weiss ( marc lawrence ) who be a nazi hunter spot olivier on a t. v. programme and recognise him a the man he have be after for year . weiss immediately tell his story to bitter and overworked police officer lieutenant sterne ( cameron mitchell ) who live just across the hall from him . sterne agree to look into weiss claim but eventually admits there be nothing he can do and especially after weiss give him some newspaper cutting from 1944 which appear to show olivier but since the paper be over 30 year old and olivier would now be in his 60 or 70 and the guy on t. v. be still in his 20 and therefore weiss story be psychically impossible . that night weiss be find dead in a parking lot . lt. sterne decides to take a personal interest and investigate even far . claire be start to lose her mind . her husband james be about to publish a book call god be dead in which jam claim god do not and never have exist . claire a a stout catholic be deeply against the book and try to convince james not to publish it . olivier and who run a cult of satan worshipper and feel james would be a good person to have on board and attempt to convince james to join him and his organisation . a guy with a beard name papini ( maurice grandmaison ) try to warn james about olivier and satan and his book denouncing god . various people die include claire nephew jim ( klint stevenson ) and claire decides that she alone must put an end to olivier and satan himself . claire and jim girlfriend ann ( christie wagner ) conduct a bizarre plan that claire believe will destroy olivier for good and but will it succeed . accord to the imdb credit list cataclysm be direct by three separate people and phillip marshak and tom mcgowan and gregg c. tallas a greg tallas . i be not sure if this information be correct but i do not think i have ever hear of a film direct by three different people and maybe that why it turn out to be a bit of a jumble up mess . the script by philip yordan try something different and for that it should get at least an extra point . even though at the end of the day it still a mess with the story all over the place . thing just happen for little reason and character aren not that likable and the dialogue in certain scene isn not up to much . the story become occasionally confusing and unfocused . the script come across a heavy hand at time with it religious overtone and story arc . almost a if yordan want to make a thought provoke horror film with a message and obviously it fail and badly . cataclysm start out very interesting and draw the viewer in by not reveal too much and too soon . unfortunately this decision to try and make the plot more mysterious back fire during the middle third a it get somewhat boring wait for something to happen but then thing explode into a gore drenched finale . the acting be ok for this type of low budget nonsense and except cift who seem to speak her line really slowly compare to everyone else . and it always nice to see genre veteran cameron mitchell . some character appear dub throughout . there be very little and in fact none and blood or gore in the film until the last 10 minute or so when the red stuff be splash everywhere . in this sequence there be some real surgery footage in a blood soak over the top climax to round the film off . i think the film itself be shoot on location rather than studio and have a generally good feel throughout and the production value be much good than i expect . while not brilliant by any stretch of the imagination the photography and editing and special effect and continuity and music be all reasonable enough and i have sit through a lot bad . i be sure a lot of people will automatically call this film crap a it an easy target but for those of u who like this sort of off beat grade z low budget horror film from day go by than this one may interest you and be probably worth track down . just because it dare to try something a little different if for no other reason and it doesn not always succeed but at least those involve tried . overall i be glad i watch it and certainly not the best film in the world but then do anyone really expect it to be .