If you're ever asked just how bad the disaster movie could get, this is the answer. Sean Connery is the astrophysicist battling with dumb politicos in order to launch nukes at a big lump of widescreen friendly rock hurtling towards Earth.
The plot is dull, director Ronald Neame has no idea how to end it and the special effects consist of stock footage of buildings being demolished screened through a red filter. The 'stellar cast', with Connery, Fonda and Landau all phoning in dreadful performances, like the Earth, it never really stood a chance
Utterly amateur and considering the comet-capers we've had since (Deep Impact & Armageddon) it doesn't look like we'll ever get a half-decent one.