China Syndrome.
(Spoilers for those who have not seen it)
All the more chilling because it was about a 'near-miss', a close call, if you will.
There were no special effects, no nuclear explosion, no mushroom clouRAB...
But it worked superbly because it showed just how easily a nuclear accident could happen, and also to what lengths the people who own and control nuclear plants would (allegedley) go to to stop people talking about it.
And it's one of Jack Lemmon's best ever performances, playing an 'ordinary' man (not an easy thing for any actor to pull off convincingly) trying to convince his bosses that they are wrong, and in danger of causing a nuclear meltdown.
Jane Fonda, as a reporter befriending him and getting involved in the drama, is good value too, as is Michael Douglas in an early role as a news cameraman.
The scene where Lemmon is shot, and while dying on the floor, eyes wide in terror, feels the vibration of the possible meltdown is truly chilling. It prompts panic amongst the power plant staff to try and shut it down, and is more powerful for me than any elaborate special effects sequences showing us the graphic nature of what could happen.
I also love the sequence after the event, with Fonda's news reporter (previously having been sidelined to reporting trivial, silly stories) has to pull herself together, after having witnessed Lemmon's character murdered in front of her for trying to tell the truth...and then has to try and compose herself to go live on TV. It's a superb performance by Fonda, kind of makes you wonder why she never really got the opportunity to do more of this kind of stuff.