Starring: Alan Davies, Caroline Quentin, Stuart Milligan
The Curious Tale of Mr Spearfish - S3-E1
Character mistake: The whole mystery kicks off when Creek sees a photograph of Alice Spearfish with her parents, and concludes that she is adopted because two people with brown eyes cannot have a child with blue eyes. An obsessive polymath like Creek must surely know that that is wrong. The genetics are complex and though uncommon it is possible for a couple with brown eyes to have a child with blue eyes and the other way around.
Plot hole: Why on earth would a sleazeball like Adam Klaus be worried about news of a one-night stand being revealed? He'd welcome the publicity, if anything. Anyone threatening to go to the papers with news of a bit of rumpy-pumpy with him would be wasting their time.
Madeline Magellan: Enough with the pedanticism and let us eat.
Jonathan Creek: The word is pedantry.
Question: What exactly did Jonathan and Maddie give to the tramp in exchange for information?
Chosen answer: It was a bottle of turpentine.
Methylated spirit, always coloured purple.
Answer: It was actually mouthwash.
Suggested correction: Jonathan actually states it's a photo of 2 blue eyed parents and a brown eyed daughter.
Which is still possible! It isn't even uncommon. Brown eyed parents can have a blue eyed child and vice versa - that's what recessive genes are all about.