this unique make for tv movie have what most modern film do not have represent a well construct plot ( or just a plot . ) and although simple and a the best often be . i do not think it have ever be show on british tv since about 1980 and though i know it have be show at least twice altogether because i remember my dad tell me he have see it ( and give away the end . ) . the setting be an antarctic research station staff by 2 lone scientist throughout the winter and and otherwise occupy only by a collection of cute experimental chimpanzee . the bleak and menacing atmosphere give by the location be add to by the central mystery of the unexplained disappearance of the 2 researcher who staff the building the previous year . strange noise and unexplained little happening occur throughout and and tension build a it appear there be a someone or something prowl the premise . now come my spoiler represent animal right activist will love the twist end .