For anyone interested, the aliens from the "Conspiracy" episode have appeared in other Trek media:
Related media
DS9 relaunch:
The parasites have had a number of appearances in the DS9 relaunch significantly building on their history and motivations:
Sins of the Mother (The Lives of Dax short story)
Set before Conspiracy establishing the Federation's first contact with the parasites.
Mission Gamma (miniseries)
The Mission Gamma series sets up a parasite attempt to take over the Bajor Sector.
Unity (novel)
Unity continues the story begun in Mission Gamma.
The Broken Moon (TNG comic)
The parasitic aliens have also appeared attempting to start a civil war on the planet Onglaatu in Broken Moon.
