Martin Sheen
Saunders (196 eps)
Stephen Brooks
Dr. Ned Lowry (98 eps)
Michael Tolan
Dr. Alex Tazinski "Ski" (98 eps)
Alan Alda
Dr. John Griffin (98 eps)
Patrick O'Neal
Tom Farrell (98 eps)
Joey Heatherton
Ellen Denby (98 eps)
Dustin Hoffman
Larson (98 eps)
Shirl Conway
Liz Thorpe (97 eps)
Zina Bethune
Gail Lucas (97 eps)
Joseph Campanella
Dr. Ted Steffen (97 eps)
Edward Binns
Dr. Anson Kiley (97 eps)
Brandon De Wilde
Paul Marker (1 eps)
Susan Kohner
Terry Collins (1 eps)
Nancy R. Pollock
Mrs. Caselli (1 eps)
José Pérez
Paco (1 eps)
George Segal
Dr. Novak (1 eps)
Malachi Throne
Mr. Baker (1 eps)
Joey Trent
Joey Baker (1 eps)
Jean-Pierre Aumont
Dr. DiCarlo (1 eps)
Elizabeth Ashley
Barbara Bowers (1 eps)
John Beal
Dr. Henden (1 eps)
Jean Stapleton
Mrs. Montgomery (1 eps)
Ruth White
Mrs. Halpern (1 eps)