This classically-trained blonde actress became a recognizable primetime face and earned four Emmy nominations as breast cancer survivor Nurse Helen Rosenthal on "St. Elsewhere" (NBC, 1983-88), Christina Pickles found a new venue in the 1990s in the recurring role of Judy Geller, the mother of Monica (Courteney Cox) and Ross (David Schwimmer) on the hit NBC sitcom "Friends."