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Warehouse 13 - Episode 4.17 - 4.18 - Episode Synopsis

Episode 4.17 - What Matters Most
When residents of a posh gated community start getting affected by a mysterious, versatile artifact, Myka and Pete investigate.

Episode 4.18 - Lost & Found
A lead on a cache of artifacts stolen from Warehouse 12 by the infamous pirate, Roaring Dan Seavey.

Source: SpoilerTV