(Season 2 V for Vitamins)
Skipper:"Look at those Grapefruit! The Professor found some Grapefruit trees!" Professor:"Yes and Lemon trees too!" Gilligan:"I knew about them!" Professor:"You mean you knew there were Citrus fruits?" Gilligan:"No not Citrus fruits, just Grapefruits and Lemons!" Professor:"Oh Gilligan, those are Citrus fruits!"