A time-travel yarn of the 'past arrives in the present' persuasion. Two WWII sailors involved in some early radar experiment tumble through the decades into 1984. The 'what the hell's happened?' passages are, as usual, more diverting than the 'what the hell can we do about it?' scenes, the latter involving merely flashing lights, showers of sparks and talk of imploding vortexes. Much more fun is the spectacle of Young 1943 trying to work out why the US President looks vaguely familiar, and how come the folks in the diner are hardly glancing at a television, on which a noisy monster is assaulting a bare-breasted starlet.