Star Trek: The Next Generation – Transfigurations [3.25]

An amnesiac patient dubbed “John Doe” who is under Dr. Crusher’s care demonstrates unusual abilities, including the power to heal. 

Star Trek: The Next Generation – Booby Trap [3.6]

Geordi works frantically to find a way to free the ship from an energy-draining radiation field before the shields collapse and the crew begins to die.  He interacts with a hologram simulation of Dr. Leah Brahms