The Fury Out of Time

Bowden Karvel's theory, that the
capsule's port of origin lay in the distant future, seemed a plausible
explanation. But while investigating, the capsule was accidentally
dispatched again through time ... only to reappear with an alien
navigator, this time destroying a small French town.

One thing
seemed imperative: a human operator must man the intricate controls of
the capsule, riding it forward to its mysterious point of origin. And
Bowden Karvel seemed the perfect choice to make the trip..."