It's So Nice to Have a Spouse Around the House - S5-E5
Plot hole: Darrin tells Serena that it was a good idea to have Endora babysit Tabitha. However, he wasn't even home when Endora left with Tabitha; he was unaware that a sitter was even needed. How could he have known? (00:12:40)
It's So Nice to Have a Spouse Around the House - S5-E5
Continuity mistake: The exterior of 1164 Morning Glory Circle is fake. It is not the exterior we have seen for years. They often go to a pained forested background with the fake exterior.
It's So Nice to Have a Spouse Around the House - S5-E5
Continuity mistake: Samantha removes a spell cast by some other witch; it's a series plot point in many episodes that Samantha cannot undo someone else's spells.
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