Star Trek: The Next Generation - Season 1eps25 -

The episode ends with the parasites transmitting a homing beacon to an unexplored sector of space, a plot point that was never officially revisited in the series.

These pink-shelled, bug-like creatures enter through the host's mouth and can be identified by a small gill-like protrusion on the back of the neck. Star Trek: The Next Generation - Season 1Eps25

Brain-controlling parasites have taken over several admirals and key officers. The episode ends with the parasites transmitting a