A trip to Chicago makes Charles and Mary appreciate their home – Laura and Mary witness the drowning of a friend – Andy and Laura become crime investigators – Outlaw, Jesse James, and his brother hide out in Walnut Grove - Nellie falls in love and makes wedding plans – Laura finds a mysterious message that leads her to an abandoned baby – Charles inherits some money from a relative - Caroline becomes pregnant with their fourth child – The Ingalls are devastated by the news that Mary is going blind - These and all of the other exciting adventures from the entire Fourth Season are presented in this Special Collector’s Edition!