Discover
Adam becomes depressed when Mary announces she can distinguish between light and dark.
Original Release
02/26/1979
US Release
02/26/1979
Cast
| Name | Character |
|---|
| Karen Grassle | Caroline Ingalls |
| Melissa Gilbert | Laura Ingalls |
| Melissa Sue Anderson | Mary Ingalls Kendall / Mary Ingalls |
| Rachel Lindsay Greenbush | Carrie Ingalls |
| Sidney Greenbush | Carrie Ingalls |
| Richard Bull | Nels Oleson |
| Katherine MacGregor | Harriet Oleson / Harriet Olson |
| Kevin Hagen | Dr. Hiram Baker |
| Matthew Labyorteaux | Albert Quinn Ingalls |
| Linwood Boomer | Adam Kendall |
Directors
Writers
Blanche Hanalis, Laura Ingalls Wilder, Don Balluck
Cast
| Name | Character |
|---|
| Karen Grassle | Caroline Ingalls |
| Melissa Gilbert | Laura Ingalls |
| Melissa Sue Anderson | Mary Ingalls Kendall / Mary Ingalls |
| Rachel Lindsay Greenbush | Carrie Ingalls |
| Sidney Greenbush | Carrie Ingalls |
| Richard Bull | Nels Oleson |
| Katherine MacGregor | Harriet Oleson / Harriet Olson |
| Kevin Hagen | Dr. Hiram Baker |
| Matthew Labyorteaux | Albert Quinn Ingalls |
| Linwood Boomer | Adam Kendall |
| Ketty Lester | Hester-Sue Terhune |
| Nathan Adler | Dr. Fromm |
| Michelle Downey | Susan 'Sue' Goodspeed |
| Vince Tortell | Thomas |
| Ruth Foster | Melinda Foster |
| Jack Lilley | Townsman |
| Michael Landon | Charles Ingalls |
| Wendi Turnbaugh | |
| Brenda Turnbaugh | |
| Merlin Olsen |
Producers
| Name | Role |
|---|
| Michael Landon | Executive Producer |
| William F. Claxton | Producer |
| Kent McCray | Producer |
