This is the title of a 1982 made for tv film , starting Barry Newman and the rest of the cast is mostly australian . Barry Newman plays a reporter uncovering a nuclear blackmail against the australian government . A time based nuclear bomb is placed in a a skyscraper somewhere in Sydney .While the government eventually pays , the airplane with which the blackmailers flee crashes before de-activating the bomb. Its up to the reporter now along with another female companion and nerdy computer guy to use the information they have to get to bomb , while also chased by security forces trying to stop them from breaking the news to the public.
More info on http://www.imdb.com/title/tt0083799/
If anyone has this film most probably is in VHS . i searched online and it seems it wasn't released on DVD. I am wiling to pay a conversion from VHS to MPEG along with all the other expenses for mailing the DVD to me.
Its just one of those childhood movies i happened to have had on (long ago destroyed ) VHS , which just stayed on my mind