Bus Crash: Caroline's mother (who'd previously appeared in a flashback episode) dies during her trip to Walnut Grove. Also, the narration informs her stepfather would die two years later.
Exact Words: Albert tricks Mrs. Oleson into helping sell his gradnfather's book, which she'd initially turned down, by commenting on how there was an incident included in it involving Caroline naked and surrounded by men. Mrs. Oleson takes the bait and gleefully contributes to the book, only to find that it was an innocuous incident which happened when she was a baby.
History Repeats: Once again, a grandfather of Laura's gets depressed after losing his wife and rethinks his life before finding a new purpose.
Most Writers Are Writers: The Ingalls convince Frederick to write about stories of his life and compilate them into a book. It winds up becoming a sucessful novel.
Spared by the Adaptation: The real Frederick Holbrook died when Laura was 7, at the age of 54. Here, he lives to see Laura as a teen and even outlives his wife, who in real life outlived him by 10 years.
