Matt Bomer and Willie Garson

The clock is ticking for Mozzie (Willie Garson) on the Season 5 finale of White Collar, and we're not just talking about his race to find the Hope Diamond's twin before Rebecca (Bridget Regan) does.

In this exclusive sneak peek from Thursday's episode (9/8c, USA), Mozzie's life is left in Neal's hands, literally, when he, Neal (Matt Bomer) and Peter (Tim DeKay) team up to try to find the lost twin of the Hope Diamond.

Returning winter shows: Where we left off

Mosconi's clues lead the trio to the magic number — the 33rd degree — but Mozzie passes out on the spot. However, he gathers enough strength to point Neal and Peter in the right direction. Hear his final words of wisdom in the exclusive clip below:

White Collar's season finale airs Thursday at 9/8c on USA.