Usually when Geordi takes his VISOR off, we can see the blinking red lights of the interface where the VISOR is supposed to connect to his face. Good thing they became invisible when he transformed. Otherwise, they wouldn't have needed ultraviolet light in order to find him.
On the planet's surface, when Riker tries to contact Lieutenant Commander Leitjen, he, somewhat curiously, uses her first name, saying, "Riker to Susanna."
When Geordi was being transformed, he wasn't wearing his visor. He was somehow able to see even though his eyes are still white.
Marina Sirtis was credited but does not appear in this episode.
The other two uncredited aliens shown near end with Geordi are played by LA radio personalities Mark (Thompson) & Brian (Phelps).