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Mark Tewksbury (2001)
Lynn Herzeg (2002–2004)
June Wallack (2005)
Lynne Adams (2006–2016)
How It's Made - Padlocks - Season 9 - Episode 6 (2007)
The show is presented on the Science Channel in the US, Discovery Channel Canada in Canada, and on the Discovery Channel in the United Kingdom.
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