Chains of Command

While exploring a group of devastated class-M planets in a remote sector of space, the crew of the U.S.S. Enterprise is shocked to discover a group of human slaves on a forbidding, glacial world. When the slaves revolt against their human overseers, Captain Picard and his crew sympathize with the slaves plight but cannot interfere in the conflict. After the revolt is a success, Captain Picard learns that both the slaves and the overseers were controlled by a mysterious bird-like race called the Tseetsk, who are coming to reclaim their property. With the time running out, the rebels kidnap Captain Picard and Counsellor Troi—drawing the U.S.S. Enterprise into the middle of their deadly plan of vengeance.