Catherine and Tess are on the case! This is a photo from the episode "Basic Instinct."
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Vincent offers to sacrifice himself on Beauty and the Beast. "Basic Instinct" is the fourth episode of the first season.
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Beauty and the Beast Season 1 Episode 4 Quotes

I'm just helping out, okay? And for once, J.T., I almost feel normal.

Vince

Westchester? You and your boyfriend Evan are totally in sync.

Tess