Vincent continues to struggle with his feelings for his ex-fiance on Beauty and the Beast. "On Thin Ice" is the tenth episode of the show's first season.
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Beauty and the Beast Season 1 Episode 10 Quotes

Vincent: You and Catherine, you risk so much to keep me safe.
J.T.: And you don't want Alex to take the same risks.
Vincent: No.

Cat: You don't need to explain. She was your fiancée. You were planning a life together for years.
Vincent: Six years and an entire childhood.