Tintin and the Picaros: Part 1 - S2-E8
Character mistake: When the bell on Haddock's clock rings, there is a shot showing the clock with the time on 8:00. All of the numbers used to represent the time shown on the clock are written in roman numerals, however, the roman numeral for the 8 shown on the clock is written out as VI. Eight in roman numerals should be VIII. (00:01:45)
Answer: According to Wikipedia, he is described as being a youth anywhere from 14 - 19 years old. There is no specific age.
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