Star Trek: The Next Generation – The High Ground [3.12]

Dr. Crusher is kidnapped by violent separatists in desperate need of a doctor.  She grows sympathetic toward their leader, Finn. 

Star Trek: The Next Generation – Ensigns of Command [3.2]

The Enterprise discovers a human colony world on a planet which, by treaty, belongs to an unsympathetic and powerful alien race. 

Star Trek: The Next Generation – Up the Long Ladder [2.18]

The Enterprise help the descendants of a remote human colony made up of Irishmen and their farm animals to evacuate their doomed world.  Hilarity ensures. 

Star Trek: The Next Generation – Pen Pals [2.15]

The Enterprise investigates a remote system where planets are being torn apart by their won geology.  Data begins to communicate with Sarjenka, a young girl on one of these worlds (who know nothing of extra-terrestrial life), and asks Picard to find a way to help her and her people, even though doing so would violate the Prime Directive.

Star Trek: The Next Generation – The Measure of a Man [2.9]

Data is ordered to transfer to the command of a robotics expert who intends to dismantle Data in order to study him and duplicate him.  When Data refuses even to the point of resigning his commission, he becomes the center of a legal battle to determine if he has the rights of a sentient being.