Star Trek: New Frontier

In “Slingshot”, the most dangerous experimental vessel in the galaxy—a prototype time ship—has vanished, and it appears that the man who stole it is none other than Starfleet Admiral Edward Jellico. Only Mackenzie Calhoun and the crew of the Excalibur have a hope in finding him before the ship, intended purely for scientific exploration, is used to disrupt the space-time continuum.