Star Trek No. 71.  The crew of the Nautilus, a battered Starship of mysterious origin, is beamed about the Starship Enterprise. The group claims they are freedom fighters from  the future, working to save the Federation from the Consilium – a gang of corrupt power-seekers. But when the Nautilus crew members suddenly seize control of the Enterprise and a Starship from the future arrives to arrest the renegades, Kirk must separate his true allies from those out to destroy the Federation.   Cover art by Keith Birdsong