Directed by
Robert Wiemer.
Encountering a mysterious comet, the Enterprise discovers an ancient artifact within the cosmic phenomenon. This artifact has a strange and sinister effect on the crew members, converting them into alien creatures and their ship into an ancient city. Data exhibits a different set of side effects, splitting into multiple personalities, all drawn from a long-extinct civilization. Written by Joe Menosky, "Masks" first aired February 26, 1994. ~ Hal Erickson, All Movie Guide