This is definitely a must-see for fans of classic science fiction, but it leans heavily on the social and sociological aspects of apocalypse rather than scientific speculation, so it's equally entertaining for those interested in a thriller. This also aides in the picture's timelessness; even viewed in the 21st century, it rings true. The few special effects can be forgiven their 1981 hokeyness, as the meat of the work is in the incredible story and acting.
If you are not able to see repeated re-runs of this series then go and either beg borrow or steal the DVD.
( Sorry i don't condone stealing... buy it, you wont be wasting your money )