The Invisible City

Tracking German soldiers through the muddy trenches of WWI France, Captain Charles Clee stumbles onto a secret archeological expedition from the far future. Discovered and trapped, he flees through their time machine and finds himself stranded nearly one million years in the future.

Pursued by the merciless assassins of the Time Police and by Earth's alien masters, Clee battles war, slavery, and fantastic beasts from tomorrow and yesterday, racing against time itself in a world where his very existence is punishable by death. But in the end, he must make a choice: save the future at the price of his honor, or rescue the past at the price of his soul.