Starship Mine

The Enterprise docks at the Remmler Array for a baryon sweep, a cleaning process lethal to any living thing, and the crew go ashore to the Arkaria base. Picard escapes the dull small talk of his host, Commander Hutchinson, by going back aboard to collect his riding saddle. There he finds supposed technicians who are actually thieves, led by Kelsey, out to steal trilithium resin from the warp engines, an unstable and dangerous substance. Meanwhile their accomplices take the officers at the reception hostage. Alone, Picard plays cat and mouse with the gang through the ship as the deadly sweep advances. He removes a control rod from the resin container. The crew overpower their captors on the base and halt the sweep, while Kelsey escapes in a shuttle, which is destroyed when the unstable resin explodes.