The Murder of Sherlock Holmes - S1-E1
Revealing mistake: In part 2 of the episode, when Jessica is mugged, Angela Lansbury is replaced with a younger and thinner stunt double twice: when she runs away and when she protects herself against the wall.
The Murder of Sherlock Holmes - S1-E1
Revealing mistake: In part 2 of the episode, when Jessica is mugged, Angela Lansbury is replaced with a younger and thinner stunt double twice: when she runs away and when she protects herself against the wall.

Funeral at Fifty-Mile - S1-E22
Continuity mistake: When Jessica walks from the house to the barn at the end, she is wearing knee high brown boots. By the time she reaches the barn they have been replaced with court shoes.
Trivia: The song Angela Lansbury sings, "Little Yellow Bird," when she plays musical hall performer Emma, is the same song she sang in the 1945 film The Picture of Dorian Gray, when she played music hall performer Sybil Vane.
Murder on the Thirtieth Floor - S10-E15
Question: What did Edward mean in his note to Jessica that he was right in the first place?
Answer: At the start, Edward told Jessica that he loved the changes she'd made to her new book. Later, as his mental condition declined, he said the book was terrible and he wouldn't publish it until she made improvements. Edward's later note to Jessica was to apologise for saying her novel was bad and that he had been right about it the first time.
raywest ★