Episode 19 of "Medium"
s02e03 Time Out of Mind
Title: Time Out of Mind
Original Air Date: 10/03/2005 on NBC
Director: Arliss Howard
Writer: Robert Doherty
Guest Stars: Bonnie Urseth (Nurse), Sam Anderson (Dr. Eliot Peterson), Natasha Gregson Wagner (Beverly Waller), Derick Alexander (Orderly #1), Steven M. Gagnon (Cop #1), Barbara Tarbuck (Carol Waller Smith), Warren Sweeney (Security Guard), Chloe Webb (Margaret Folsom), Ronald William Lawrence (Orderly #2), Loren Lazerine (Cop #2), Tim Conlon (Mr. Waller), Sarah Utterback (Carol Waller)
Plot Outline:
When Allison (Emmy winner Patricia Arquette) dreams she's a woman who's been committed to a mental institution in 1959, she discovers that the woman was real - and claimed to be Allison DuBois, living in 2005. Miguel Sandoval, Jake Weber, David Cubitt, Sofia Vassilieva and Maria Lark also star.
