The Mintakan tapestry that is given to Picard by Nuria and the villagers is seen on Captain Picard's chair in his quarters in many subsequent occasions on Star Trek: The Next Generation. After the Enterprise-D is destroyed in Star Trek: Generations (1994) Picard keeps the tapestry on the back of his chair in the ready room of the Enterprise-E, it can been seen in both Star Trek: First Contact (1996) and Star Trek: Insurrection (1998).
The Enterprise visits the planet Mintaka III in this episode. Mintaka is also the name of the westernmost star of the three stars that form Orion's belt in the constellation Orion. It is a white-blue Super Giant star located approximately 900 light-years from Earth, and is over 20 times larger and 7,000 times brighter than our Sun.
The title is related to the "Quis custodiet ipsos custodes", a Latin phrase from the Roman treatise Satires of Juvenal, written around AD 100, translated as "Who guards the guards themselves" or something similar. Another Juvenal expression provided the title of Bread and Circuses (1968).
The idea of observing another civilization from a holographic duck blind is used again in Star Trek: Insurrection (1998).
The scene where Riker is hiding from the citizens was shot at Santa Clarita, California at Vasquez Rocks, where Arena (1967) was filmed.