When Mary and Laura show up at Widow Thurman's house with the dress fabric, why doesn't Charles, who is still trying to keep the secret about the dishes, tell the girls not to mention to their mother that they saw him there? He had to have considered that the two of them, being kids, would go home and tell her what they saw. Perhaps he wanted to keep the dishes a secret from everyone, but he was taking a big risk by saying nothing.
Nitpick: When Mary and Laura turn to leave the mercantile (right after they tell Nels that they weren't invited to Nellie's party), you can clearly see a 1970's--not 1870's--"Goody" style barette in Mary's hair, made of shiny black plastic.
Mariette Hartley, here portraying the widow Thurman, was a very popular character actress in the 1960's and 70's, appearing in everything from "The Twilight Zone" to Kodak commercials to Bill Bixby's love interest in "The Incredible Hulk."
The shot of Laura and Mary walking up a hill toward a flock of sheep was reused from the episode Ebenezer Sprague.
Mrs. Oleson: Mrs.Ingalls.
Caroline: Hello, Mrs.Oleson.
Mrs. Oleson: Oh, my, I bet your hens have been working overtime again, haven't they?
Caroline: Well, we haven't had much need for eggs lately. Charles is gone right in the mornings.
Mrs. Oleson: Yes. (sighs) I imagine that he has a very rigorous schedule.
Caroline: He's been very busy at the mill.
Mrs.Oleson: Is that what he told you?
Caroline: What do you mean by that?
Mrs. Oleson: Believe me, Mrs. Ingalls, I don't want to be the one to tell you this, but, well, since we're such good friends, I must tell you.
Caroline: Please, Mrs. Oleson.
Mrs. Ingalls: Mrs. Ingalls, I don't know, it upsets me so, but I don't know. Why is it that the wife is always the last one to know?
Caroline: I do. I know everything!
Mrs. Oleson: Did you know that Mrs. Thurman did not tell you the truth? Nor did your husband?
Caroline: I know, already!
Mrs. Oleson: Oh, my dear, my dear, you don't know what happened. Now, I have been asking around, purely out of my consideration for you, you understand, and I understand that your husband has been seen coming and going from the Widow Thurman's home everyday for a week! Now, if I were you--
Caroline: Well, you're not me, Harriet!
Mrs. Oleson: What?!
Caroline: In the first place, it is none of your business!
Mrs. Oleson Mrs...!
Caroline: In the second place, I know already! Thirdly, I trust Charles completely! (storms out)
Laura: (overvoice) We used the new dishes at supper that night, and every night after that, because Pa says that special dishes aren't for special occasions--they're for special people. And a family all together is the most special of all!
Filming Locations: Filmed at Big Sky Ranch, Simi Valley, Basin Creek and Cover's Apple Ranch near Tuolumne California and Paramount Studios, Hollywood, California.