Humbug Not to Be Spoken Here - S4-E16
Other mistake: In the previous episode, I've Got Your Nanny Right Here, Samantha tells Darrin "nobody travels by broom stick anymore. It's obsolete." She takes Mr. Mortimore to North Pole by broomstick.
Bewitched (1964)
1 mistake in Humbug Not to Be Spoken Here
Starring: Agnes Moorehead, Dick York, David White, Elizabeth Montgomery
Samantha: I'm not a bad witch! I'm a good witch.
Darrin Stephens: Her mother's a bad witch.
Mirror, Mirror on the Wall - S5-E6
Trivia: The angry driver behind Darrin who yells "Let's go, Gorgeous!" is producer William Asher who was married to Elizabeth Montgomery at the time. (00:04:30)
I'd Rather Twitch Than Fight - S3-E10
Question: Darren was angry at Samantha for getting rid of his favorite coat so, why was he even angrier when he got it back?
Answer: I haven't seen the episode, but generally in the show, Darrin was always suspicious that Samantha always used some kind of witchcraft for any situation (even if she didn't). He probably figured the same thing with the coat while in her possession.
You should watch the episodes in question before giving an answer so you know what you're talking about.
Answer: Larry had been telling Darrin what it means psychologically that Samantha gave the coat away. Larry said giving it away meant she's happy being married but if she liked the coat it means she desires to be single and carefree. So when Darrin sees the coat, he immediately thinks Samantha doesn't want to be married and the fact that she twitched it means (in his mind) she wants to be a single, carefree witch again.
Bishop73