Star Trek: The Next Generation – Symbiosis [1.21]

After rescuing a distressed freighter, the Enterprise become involved in a dispute between representatives of two neighboring worlds who exist in a strange symbiotic relationship. 

Star Trek: The Next Generation – Arsenal of Freedom [1.20]

The Enterprise investigates a planet of weapon manufacturers where all life has abruptly disappeared, along with an investigating Starfleet vessel. 

Star Trek: The Next Generation – 11001001 [1.14]

While docked at a starbase for maintenance, Riker is astounded to meet an attractive and extremely realistic holodeck character called Minuet.  Meanwhile, the Enterprise crew are tricked into abandoning ship

Star Trek: The Next Generation – Datalore [1.12]

Returning to the destroyed colony where he was originally found, Data and the Enterprise discover and reactivate an identical android known as Lore.