Michael Landon Charles Ingalls Actor, Executive Producer, Writer Karen Grassle Caroline Ingalls Actor Melissa Gilbert Laura Ingalls Wilder Actor Melissa Sue Anderson Mary Ingalls Kendall Actor Karl Swenson Lars Hanson Actor Richard Bull Nels Oleson Actor Katherine MacGregor Harriet Oleson Actor Alison Arngrim Nellie Oleson Dalton Actor Kevin Hagen Dr. Baker Actor Dabbs Greer Rev. Robert Alden Actor Charlotte Stewart Eva Beadle Simms Actor Victor French Mr. Isaiah Edwards Actor Matt Clark Eric Boulton Guest Star Helen Clark Sylvie Boulton Guest Star Bradley Greene Paul Boulton Guest Star Leslie Landon Etta Plum Guest Star Lindsay Greenbush Carrie Ingalls Actor Sidney Greenbush Carrie Ingalls Actor Ed Friendly Executive Producer William F. Claxton Director