Imaginary Friend
Young Clara Sutter has an “imaginary friend”, Isabella, who comes to life when a plasma-based lifeform enters the ship and assumes Isabella’s shape. Isabella gets Clara into all sorts of trouble, while other plasma lifeforms are draining power from the ship. Deanna tries to prove to Clara that her imaginary playmate can’t hurt her - and is promptly stunned by Isabella. Picard who realizes there is a connection between the energy drain and Clara’s playmate convinces the lifeforms to refrain from their attacks. summary by Ex-Astris-Scientia
Uhm… quite interesting but just a bit too predictable. I mean, it’s obvious from the start that Isabella is real. What else could you expect watching Star Trek? I wasn’t really impressed with the empathic abilities of Deanna here. She should have known earlier…