A non-Federation planet with a shabby trading market where cadet Caleb Mir finds his long-lost mother, shortly before the Venari Ral seize it, in the Starfleet Academy episode 300th Night.
Ukeck is a world outside Federation space, known for a run-down marketplace. In 300th Night, the ninth episode of Starfleet Academy, Caleb Mir learns from messages left by his mother Anisha that she is hiding there, and he goes after her in a shuttle taken without permission, along with SAM, Darem and Genesis.
Caleb finds Anisha in the market. She is wary of his companions and distrusts Starfleet, so nobody tells her who they are, though she builds the parts the shuttle needs. Then the Venari Ral announce that they are annexing the planet and close it off behind a forcefield. The other cadets are arrested as Federation spies, and Anisha is wounded in the fight to free them.
Chancellor Ake takes the USS Athena out of Federation space and beams the group up. The Venari Ral pursue, setting up the season finale.