Starship Mine

The Enterprise has been evacuated to allow a procedure to remove baryons that have built up on the ship during warp travel. Just before the (deadly) baryon sweep is scheduled to begin, Picard returns to the ship to retrieve his saddle. There, he finds a group of people attempting to steal trilithium resin, a byproduct of the warp drive, which could only be used as a weapon. Picard assumes they are terrorists, but comes to understand that they are merely thieves–arms dealers.

They play cat and mouse in the abandoned and powered-down Enterprise, moving forward to keep ahead of the baryon sweep. Finally, Picard ends up in a fistfight with Kelsey, the leader (and last living member of their group, incidentally). Kelsey escapes with the trilithium resin, but not before Picard has disabled a crucial safety component, so her ship is destroyed as she tries to make her getaway. At the last moment, Picard is able to call the station and have them halt the baryon sweep.

It's just an action show, really. It's fun enough, though there's nothing very Trek-like about it.