The Trip Tucker reference article from the English Wikipedia on 24-Apr-2004
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Trip Tucker

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Commander Charles Tucker III, known as Trip (for "triple"), is a fictional character in the television series . He is Chief Engineer on the the Enterprise NX-01. While a very knowledgeable engineer, he can be rash and "illogical" (to borrow a phrase from T'Pol).

Tucker had the dubious distinction of being the first pregnant male, in the episode "Unexpected".

Trip Tucker lost his sister, Elizabeth, in the Xindi attack on Earth.