Synopsis: The Bajoran scientist who used to be Odo’s teacher arrives with evidence of others of Odo’s kind.

Memory Alpha Summary: Sort of

Review: Most episodes that focus on Odo and his possible origins end up being pretty good, though this one is only about average.

The shapeshifting life form they bring back ultimately doesn’t provide any clues to Odo’s history and dies unceremoniously as Odo himself loses his mind and nearly kills several crew members without knowing it. The writers threw in enough red herrings that I was surprised to find out the monster was actually Odo, but once the surprise wore off, the conclusion was pretty anticlimactic, especially since this potential Changeling disorder is never broached again.