Secret Service agents Lattimer and Bering are « rewarded » with a transfer to the top-secret Warehouse 13. They meet Artie Nielsen, the caretaker of the mysterious warehouse, who tells them about their new job. The agents are responsible for the collection of every supernatural and unexplained item that the U.S. Government has ever collected. For their first assignment, they are sent to Iowa to investigate a possible artifact belonging to a college student who went berserk and assaulted his girlfriend while chanting an Italian incantation.

The past becomes the present when one half of the Darling Mermaid Darlings’ arch rivals, the Aquadolls, is killed. In order to find the murderer, the Darling Mermaid Darlings must come out of retirement with Ned as their manager and Olive as their stylist. Chuck, of course, cannot participate. Olive gets close to Sid, with whom she shares her experiences in gender discrimination, what with him being a male synchronized swimmer and her attending Vassar on a jockey scholarship. But was Sid jealous enough of the headliners to commit murder?

Lila Robinson, a beautiful grifter from Emerson’s past resurfaces, revealing a painful secret that Emerson has kept hidden all these years. Now on the lam for murder, Lila promises Emerson a quid pro quo if he clears her name.

Skyler and Walt collide in the season finale as her frustration with his secrecy finally comes to a head. Jesse self-destructs after a personal blow, forcing Walt to come to his aid. Donald’s grief leads to tragedy.

Erin Embry, window dresser extraordinaire for Dicker’s department store, is killed and Chuck manages to get the Pie Hole gang on the case. Erin’s fans think it was her window-dressing partner, Coco Juniper, who did the deed. Apparently the two artistic minds did not always meet.