Starring: Jane Hylton, Jessica Forte, Michael Crawford, Michele Dotrice
Wendy House - S3-E2
Other mistake: When Frank, Betty and the insurance assessor are sitting on the sofa, it's obvious that all three actors are trying hard not to laugh when the assessor starts sinking into the sofa.
Revealing mistake: When Frank is talking to the postman at his front door, it's so obvious it's a studio set. The background seen outside the front door is painted scenery.
Michael Crawford performed all of his own stunts in this series.
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