The Waiting Game Bonanza : Season 5 Episode 10

When Frank Dayton is thrown from his horse and killed, his wife Laura tells their daughter, Peggy, that he went on a long trip, preferring to let the little girl hold onto the hope that her daddy would come home again someday. But Laura's plan to shelter Peggy from her father's death is soon challenged when Adam Cartwright comes to call and the pretty widow finds herself falling in love.