Zoe's Phony Matrimony - S2.E18

In the series finale, Zoe and Dan go undercover as a soon-to-be-married couple to catch Leo's sister's murderer, who is a wedding planner. As they struggle to keep their cover, Zoe discovers an offensive item in Dan's suitcase and nearly calls off the "wedding". Meanwhile, Leo isn't afraid to break the rules to nab the killer. Taylor, Hannah, and Cliff are convinced that Zoe has eloped with Dan when they overhear a phone conversation. In the end, an emotional wedding leaves Zoe and Dan in a sticky situtation.