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Hot/Cold: People's Temperatures (1x31)

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Trini has been standing in the freezing cold, threatening to become almost as sick as Marc. Lisa gives a demonstration on feeling hot and cold. But the biggest surprise comes when Lisa brings in Vicky Johnson, an engineer who designs life-support systems for astronauts. On location: Lisa witnesses an infrared camera. Trini learns about protecting the human body from the cold while climbing a mountain. ANIMATION: Fahrenheit vs. Celsius. THE BLOODHOUND GANG: "The Case of the Secret Message, Part One." Vikki recovers a lady's purse, which contains only a message written in salt-water solution. (Concludes in next episode.)