Michael Landon Jonathan Smith Creator, Actor Victor French Mark Gordon Actor Margie Impert Diane Wilson Guest Star Bill Erwin Clarence Kelly Guest Star James Troesh Scotty Wilson Guest Star Anne Marie Howard Trish Kelly Guest Star Didi Conn Wanda Guest Star James Sloyan Dr. Bryant Guest Star Mary Jackson Rose O'Hara Guest Star Paul Walker Todd Bryant Guest Star Robert Mandan Frank Kelly Guest Star Nada Rowand Mrs. Burke Guest Star Dean Scofield Brad Guest Star Barbara Stuart Carla Kelly Guest Star Charles Quertermous Steve Guest Star David Adams Bob Guest Star Doug Hale Businessman Guest Star Ann Walker Trish Guest Star Ellen Gerken Reporter Guest Star Richard Hoyt Miller Observer Guest Star