The Great Voice Robbery - S1-E3
Audio problem: Several times throughout the episode while the characters are speaking in other people's voices the spoken words don't match the lip movements.
The Bugaloos (1970)
1 mistake in The Great Voice Robbery - chronological order
Starring: John McIndoe, John Philpott, Wayne Laryea
Firefly, Light My Fire - S1-E1
Benita: Maybe a little torture will change your tunes!
Harmony: What more can you do to us? We've already heard you sing.
Lady, You Don't Look Eighty - S1-E13
Trivia: Caroline Ellis (Joy) references her actual birthday of October 12 when she complains the boys forgot it.