Audio problem: When singing "Goodbye little yellow bird" Emma blows a kiss to Oliver offstage, but she is still singing the song when she is blowing the kiss. Although it's possible she was pretending as it was part of the act, her voice wasn't even muffled by her hand.
Murder, She Wrote (1984)
1 audio problem in Sing a Song of Murder - chronological order
Revealing mistake: When the first scene at Emma's hideaway was shown, obviously the two characters Emma and Jessica were filmed seperately on the couch and then the film was put together (as both are played by Angela Lansbury). However Jessica did a lot of moving while she was talking, so Emma was looking straight across at where she had been, despite her bending down while she talked.
Trivia: Angela Lansbury is the only actress to appear in all 264 episodes of the show.
No Accounting for Murder - S3-E19
Question: Why did the Phantom run out of nowhere after tying up the killer when Grady came into the room with Jessica? Did the Phantom try to avoid being seen by others except Jessica?
Answer: Yes, he didn't want to be a hero. He liked being the Phantom going anywhere and doing what he pleases with people thinking there was a ghost.