Season 1, Episode 19
The other Blackwell child is revealed as the Circle members confront disturbing theories about the events of 16 years earlier. Meanwhile, Diana tries to balance her pursuit of the Glaser crystal with her romantic life; and Callum tries to reinsert himself into Melissa's life.
Original Air Date: Apr 19, 2012
Michael Graziadei: Callum
Joe Lando: Blackwell
John de Lancie: Royce