(written from a Production point of view)
Candace Villwock is the actress who appeared with her twin sister Nicole as the infant Deanna Troi in the Star Trek: The Next Generation seventh season episode "Dark Page" in 1993. She received no credit for this appearance. Her parents are Debbie Villwock and Mark Correy who worked for four years as a regular background actor on Star Trek: Enterprise.
Other projects on which the twins worked together are the television drama Empty Cradle (1993, with Penny Johnson, John Doman, Stefan Gierasch, Aaron Lustig, and Deborah Landis and written by Rebecca Soladay) and the television drama A Place for Annie (1994, with David Spielberg, Richard Gilbert-Hill, Wendy Robie, Claudette Sutherland, and Eric Morgan Stuart).